9+ Is Two-Footed Driving Illegal? Laws & Safety

is it illegal to drive with two feet

9+ Is Two-Footed Driving Illegal? Laws & Safety

Operating a motor vehicle with both feet, one on the accelerator and the other hovering over or resting on the brake pedal, is a practice generally discouraged by driving instructors and safety experts. This method can lead to unintended simultaneous activation of both pedals, potentially causing reduced braking effectiveness, increased wear and tear on braking components, and an elevated risk of collisions, particularly in emergency situations.

Promoting proper pedal control enhances driver safety and vehicle longevity. Historically, single-foot operation has been emphasized in driver education, reflecting the design and function of modern vehicles. Consistent, controlled pedal input contributes to smoother vehicle operation, improved fuel efficiency, and a more predictable response in critical driving scenarios.

The following sections will explore in greater detail the reasons behind these recommendations, the potential mechanical and safety implications, and alternative driving techniques for optimal vehicle control and road safety.

1. Legality varies.

While no universal law explicitly prohibits driving with two feet, the practice often violates implied safe driving regulations. Regulations focus on maintaining vehicle control and avoiding actions that endanger others. Operating a vehicle in a manner that compromises control, such as by potentially applying both accelerator and brake simultaneously, could be considered a violation, even if not explicitly stated. For instance, tailgating due to reduced braking control stemming from two-footed driving could lead to a citation for following too closely. Furthermore, causing an accident due to improper pedal control, regardless of the number of feet used, could result in legal repercussions. Therefore, while the act of using two feet might not be directly illegal everywhere, the resulting unsafe driving behaviors often are.

This legal ambiguity underscores the importance of focusing on the underlying principle of safe vehicle operation. Driving instructors consistently emphasize single-foot operation for optimal control and responsiveness. This method allows for smoother transitions between acceleration and braking, minimizing the risk of unintended simultaneous pedal application. By prioritizing safe driving practices, motorists can avoid potential legal issues stemming from compromised vehicle control, regardless of specific legal language regarding two-footed driving.

Ultimately, the question of legality regarding two-footed driving is less critical than the universally recognized importance of safe vehicle control. Adopting the recommended single-foot technique provides drivers with the best possible control over their vehicles, reducing the risk of accidents and subsequent legal issues. This focus on safe practices, rather than narrowly interpreting legal definitions, ensures responsible vehicle operation and contributes to safer roadways for all.

2. Safety concerns.

Operating a vehicle with two feet presents significant safety concerns, even if not explicitly illegal in all jurisdictions. The practice can compromise a driver’s ability to react effectively in critical situations, increasing the risk of accidents. This section explores key facets of these safety concerns, highlighting the potential dangers associated with two-footed driving.

  • Reduced Braking Force:

    Resting a foot on the brake pedal can lead to partial brake engagement, generating friction and heat, ultimately reducing braking effectiveness when full braking force is required. This “brake fade” can significantly increase stopping distances, elevating the risk of collisions, particularly in emergencies. Moreover, the added strain on the braking system leads to premature wear and tear, potentially resulting in brake failure.

  • Delayed Reaction Time:

    In unexpected situations, drivers using two feet may instinctively apply both pedals simultaneously. This divided input reduces overall braking force and can lead to loss of control. The critical moments lost in transitioning from accelerator to brake with a single foot, compared to the near-instantaneous response possible with dedicated pedal control, can be the difference between avoiding a collision and causing one. This delayed reaction becomes even more critical in adverse weather conditions or at higher speeds.

  • Panic Braking Complications:

    Under duress, two-footed drivers may inadvertently press the accelerator along with the brake, a dangerous combination that can lead to unintended acceleration or a complete loss of control. This scenario becomes particularly hazardous during emergency maneuvers, as the vehicle’s response becomes unpredictable, significantly increasing the likelihood of a severe accident. The increased potential for panic and improper pedal application inherent in two-footed driving underscores the importance of adhering to established single-foot braking techniques.

  • Overuse and Fatigue:

    Constantly hovering a foot over or resting it on the brake pedal leads to unnecessary muscle strain and fatigue, potentially impacting driver alertness and responsiveness over longer periods. This sustained tension can negatively affect overall driving performance, increasing the risk of driver error and accidents. The added physical and mental workload associated with two-footed operation diverts attention from crucial driving tasks, further compromising safety.

These safety concerns collectively highlight the inherent risks associated with driving with two feet. While the legality of the practice may vary, the potential for compromised vehicle control, increased stopping distances, and delayed reaction times underscores the importance of adopting the recommended single-foot operation for enhanced safety and optimal vehicle control in all driving situations.

3. Reduced Control.

Maintaining precise control over a vehicle is paramount for safe operation. Driving with two feet, one on the accelerator and the other hovering over or resting on the brake, can significantly compromise this control, leading to unpredictable vehicle behavior and increasing the risk of accidents. This diminished control stems from several factors related to improper pedal management and its impact on the vehicle’s braking and acceleration systems.

  • Simultaneous Pedal Application:

    Using two feet increases the likelihood of inadvertently applying both accelerator and brake simultaneously. This contradictory input confuses the vehicle’s systems, reducing braking effectiveness and potentially leading to unintended acceleration. The resulting loss of control can be particularly dangerous in emergency situations requiring precise and immediate pedal control. For example, attempting a quick stop with both pedals engaged can significantly increase stopping distance, potentially leading to a collision.

  • Impaired Brake Response:

    Resting a foot on the brake pedal, even lightly, can engage the brakes slightly, leading to brake drag. This constant friction generates heat and wear, reducing the brakes’ responsiveness and effectiveness when full braking force is needed. In a situation requiring rapid deceleration, the compromised braking system may not respond adequately, increasing the risk of an accident. For instance, a driver might encounter a sudden obstacle and find that the brakes, already partially engaged due to the two-footed technique, fail to provide sufficient stopping power.

  • Difficulty Modulating Pedal Pressure:

    Fine control over pedal pressure is essential for smooth acceleration and braking. Using two feet often leads to less precise pedal application, making it challenging to maintain consistent speed and smoothly navigate varying road conditions. This lack of precision can result in jerky movements, making it difficult to control the vehicle accurately, particularly in situations requiring delicate maneuvering, such as parking or navigating tight spaces.

  • Increased Risk of Overcorrection:

    The reduced control associated with two-footed driving can make drivers more prone to overcorrecting when the vehicle deviates from its intended path. This overcompensation can lead to loss of control, especially at higher speeds or on slippery surfaces. For example, a slight swerve while driving on a wet road might prompt a two-footed driver to apply both pedals simultaneously, exacerbating the situation and potentially causing a skid or spin.

These factors combine to create an environment where the driver has less precise control over the vehicle’s movements. While the legality of driving with two feet might not be universally defined, the resulting reduction in control clearly presents a significant safety risk, increasing the potential for accidents and highlighting the importance of adhering to established single-foot driving techniques for optimal vehicle control and safety.

4. Increased Risk.

Operating a vehicle with two feet, often intending to hover one foot over the brake, significantly increases the risk of accidents. This practice, while not universally outlawed, creates several hazardous scenarios directly impacting collision likelihood. The core issue lies in the potential for simultaneous accelerator and brake application, leading to compromised braking effectiveness and unpredictable vehicle behavior. This elevated risk is a central factor in the discourse surrounding the advisability and, in some interpretations, the legality of two-footed driving.

Consider a scenario where a driver approaches a yellow light. With one foot hovering over the brake, the driver might instinctively apply both pedals as the light changes. This simultaneous application reduces braking force, potentially extending the vehicle’s trajectory into the intersection, increasing the risk of a collision. Another example involves unexpected hazards. A sudden pedestrian crossing or an animal darting into the roadway requires immediate and forceful braking. A driver using two feet might inadvertently press the accelerator while braking, delaying the vehicle’s response and increasing the likelihood of impact. These examples illustrate the direct causal link between two-footed driving and heightened accident risk.

The increased risk associated with two-footed driving underscores the importance of proper pedal control. Adhering to recommended single-foot operation, where the right foot manages both accelerator and brake, minimizes the potential for simultaneous pedal application, optimizing braking effectiveness and overall vehicle control. This, in turn, directly reduces the risk of accidents. The practical significance of understanding this connection lies in promoting safer driving practices. By recognizing the inherent risks of two-footed operation, drivers can make informed decisions about their driving techniques, contributing to a safer road environment for all. Ultimately, prioritizing safe vehicle operation, regardless of specific legal interpretations regarding two-footed driving, remains paramount for mitigating risks and promoting responsible driving behavior.

5. Unnecessary Wear.

While the legality of driving with two feet can be debated, the practice undeniably contributes to unnecessary wear and tear on vehicle components, particularly the braking system. This premature wear can lead to costly repairs and potentially compromise safety. Understanding the mechanical implications of two-footed driving is essential for responsible vehicle maintenance and safe operation.

  • Brake Pad and Rotor Wear:

    Resting a foot on the brake pedal, even lightly, causes continuous friction between brake pads and rotors. This constant contact generates excessive heat and accelerates wear, significantly shortening the lifespan of these components. Imagine driving downhill with a foot lightly on the brake; the resulting friction generates substantial heat and wear, similar to what occurs, albeit less dramatically, with habitual two-footed driving. This premature wear necessitates more frequent brake pad and rotor replacements, increasing maintenance costs.

  • Brake System Strain:

    Continuous light braking, characteristic of two-footed driving, places undue stress on the entire braking system. Calipers, wheel cylinders, and brake lines experience increased wear and tear due to prolonged exposure to heat and pressure. This strain can lead to premature failure of these components, potentially compromising braking performance and increasing the risk of accidents. For example, brake lines subjected to prolonged heat can weaken and eventually rupture, leading to a complete loss of braking function.

  • Transmission Stress (Automatic Transmissions):

    In vehicles with automatic transmissions, resting a foot on the brake while accelerating creates conflicting signals for the transmission. This simultaneous application of opposing forces can strain the transmission components, leading to premature wear and potential failure. Imagine holding a person back while they try to run forward; this analogy illustrates the conflicting forces at play within an automatic transmission under two-footed operation. The resulting stress can lead to costly transmission repairs.

  • Fuel Inefficiency:

    Even slight brake application increases rolling resistance, requiring the engine to work harder to maintain speed. This increased workload translates to greater fuel consumption, adding to the overall cost of operating a vehicle. While seemingly minor, this continuous drag and the resulting fuel inefficiency accumulate over time, representing a significant and unnecessary expense directly attributable to improper driving habits.

The cumulative effect of this unnecessary wear translates to higher maintenance costs and a potentially compromised braking system. While the specific legality of driving with two feet varies, the mechanical consequences are undeniable. Adopting the recommended single-foot operation not only enhances safety but also contributes to the longevity and efficiency of a vehicle’s braking system and other related components. This prudent approach reduces long-term maintenance costs and minimizes the risk of mechanical failures that could lead to accidents. Therefore, promoting proper driving techniques benefits both driver safety and vehicle health.

6. Improper technique.

Driving with two feet, one for the accelerator and one hovering over or resting on the brake, constitutes an improper driving technique. While not universally illegal, this practice deviates significantly from established driving instruction and safe vehicle operation principles. The core issue lies in the compromised control and increased risk associated with potential simultaneous pedal application. This improper technique can lead to several undesirable outcomes, impacting both safety and vehicle longevity. Understanding the connection between this technique and its potential consequences is crucial for promoting responsible driving habits.

One primary consequence of this improper technique is reduced braking effectiveness. Partially engaging the brakes by resting a foot on the pedal generates friction and heat, leading to brake fade. This diminished braking power can increase stopping distances, a critical factor in emergency situations. Imagine a scenario requiring a sudden stop; a driver employing this two-footed technique might find their braking response compromised, increasing the risk of a collision. Furthermore, the constant light braking associated with this technique contributes to premature wear of brake components, leading to increased maintenance costs and potential mechanical failures.

Beyond the mechanical implications, the improper technique of two-footed driving significantly impacts vehicle control. Precise modulation of pedal pressure is essential for smooth acceleration and deceleration. Using two feet often leads to jerky and unpredictable vehicle behavior, making it challenging to maintain consistent speed and navigate varying road conditions. This diminished control can be particularly hazardous in adverse weather conditions or during emergency maneuvers. For instance, a sudden swerve on a wet road might prompt a two-footed driver to inadvertently apply both pedals, exacerbating the loss of control and potentially leading to a skid or spin. Promoting the proper technique of single-foot operation, where the right foot manages both accelerator and brake, is essential for enhancing vehicle control, reducing accident risk, and fostering responsible driving practices. Ultimately, prioritizing safe and proper driving techniques, regardless of the specific legal context of two-footed driving, remains paramount for ensuring road safety and responsible vehicle operation.

7. Emergency Situations.

Emergency situations demand swift, precise reactions and optimal vehicle control. Driving with two feet, a practice often debated in terms of legality, can severely compromise a driver’s ability to respond effectively in such critical moments. The potential for simultaneous accelerator and brake application inherent in this technique creates a dangerous scenario, increasing the likelihood of accidents and exacerbating their severity.

Consider a scenario where a child unexpectedly darts into the street. A driver using the single-foot method can immediately transition from accelerator to brake, maximizing stopping power. However, a driver with one foot hovering over the brake might instinctively apply both pedals simultaneously under duress. This divided input reduces braking force, potentially delaying the vehicle’s response and increasing the risk of impact. The precious milliseconds lost due to improper pedal control can have devastating consequences in such time-sensitive situations. Similarly, in a sudden swerve to avoid an obstacle, a two-footed driver might inadvertently apply both pedals, leading to a loss of control and increasing the likelihood of a skid or spin. The resulting unpredictable vehicle behavior can exacerbate the emergency and increase the risk of a more severe outcome. These real-world examples illustrate the clear connection between improper pedal control and diminished responsiveness in emergencies.

The practical significance of understanding this connection lies in recognizing the crucial role of proper driving techniques in mitigating risk. While the legality of two-footed driving might vary, its potential to compromise safety in emergencies is undeniable. Promoting single-foot operation, where the right foot manages both accelerator and brake, ensures optimal control and maximizes responsiveness in critical situations. This technique allows for immediate and forceful braking without the risk of unintended acceleration, a crucial factor in mitigating the severity of accidents. Ultimately, prioritizing proper pedal control, irrespective of specific legal interpretations surrounding two-footed driving, equips drivers to respond effectively in emergencies, contributing significantly to road safety and minimizing the potential for harm.

8. Instructor recommendations.

Driving instructors consistently emphasize single-foot operation for accelerator and brake pedals. This recommendation aligns with established safety principles and modern vehicle design. While the legality of driving with two feet varies, its incompatibility with recommended driving practices underscores the potential risks associated with this technique. Examining specific instructor recommendations clarifies the rationale behind this guidance and its connection to safe vehicle operation.

  • Enhanced Control:

    Instructors stress that using one foot allows for smoother transitions between acceleration and braking, promoting precise vehicle control. This control is crucial for maintaining safe following distances, navigating curves effectively, and responding appropriately to changing road conditions. Imagine merging onto a highway; single-foot operation enables smooth acceleration and precise adjustments to match the flow of traffic, while two-footed driving could result in jerky movements and compromised control.

  • Optimized Emergency Response:

    Instructors highlight the importance of single-foot operation for maximizing braking effectiveness in emergencies. This technique minimizes the risk of inadvertently applying the accelerator while braking, a dangerous scenario that can occur when using two feet. For instance, if a pedestrian unexpectedly crosses the street, a driver using one foot can react instantly and apply maximum braking force, while a two-footed driver might unintentionally press both pedals, reducing braking effectiveness and increasing the risk of a collision.

  • Reduced Wear and Tear:

    Driving instructors often explain how resting a foot on the brake pedal leads to premature wear of brake components. This constant friction generates heat and reduces brake responsiveness, compromising safety and increasing maintenance costs. Consider driving down a long, gradual incline; lightly applying the brake with one foot while simultaneously accelerating with the other generates significant friction and heat, accelerating brake wear. This analogy illustrates the long-term consequences of two-footed driving on brake system longevity.

  • Consistency and Predictability:

    Instructors emphasize the importance of developing consistent and predictable driving habits. Single-foot operation promotes muscle memory and standardized responses, reducing the likelihood of errors in critical situations. This consistency becomes particularly crucial in adverse weather conditions or when navigating complex traffic scenarios. For example, driving in heavy rain requires precise control; consistent pedal application using a single foot allows for predictable vehicle behavior, while two-footed driving could lead to erratic movements and compromised stability.

These instructor recommendations collectively emphasize the importance of single-foot operation for safe and effective vehicle control. While the explicit legality of two-footed driving may vary, its clear contradiction of established driving instruction underscores the inherent risks associated with this practice. By adhering to instructor guidance, drivers can enhance their control, improve their responsiveness in emergencies, minimize unnecessary vehicle wear, and develop consistent driving habits that contribute to overall road safety. This consistent emphasis on single-foot operation reflects a deep understanding of vehicle dynamics and a commitment to promoting responsible driving practices that prioritize safety and minimize risk.

9. Modern vehicle design.

Modern vehicle design inherently supports and encourages single-foot operation for accelerator and brake pedals. This design philosophy reflects decades of engineering advancements focused on safety, efficiency, and optimal driver control. While the legality of driving with two feet remains a point of contention, its incompatibility with modern vehicle design further underscores the potential risks and disadvantages associated with this practice. Exploring the specific design elements that favor single-foot operation clarifies the connection between vehicle engineering and recommended driving techniques.

  • Ergonomics and Pedal Placement:

    The placement and spacing of pedals in modern vehicles are ergonomically designed to facilitate comfortable and efficient single-foot operation. The accelerator and brake pedals are positioned for easy access and smooth transitions with a single foot, promoting precise control and minimizing the likelihood of unintended simultaneous pedal application. This design encourages natural ankle flexion and extension, allowing for controlled modulation of pedal pressure. Conversely, attempting to operate pedals with two feet often requires awkward positioning and can lead to inconsistent pedal application and compromised control.

  • Brake System Design:

    Modern braking systems are engineered for rapid and effective response to single-foot input. Features like anti-lock brakes (ABS) and electronic brake-force distribution (EBD) rely on precise pedal modulation, which is best achieved with single-foot operation. Simultaneous accelerator and brake application, common in two-footed driving, can interfere with these systems, reducing their effectiveness and potentially increasing stopping distances. For example, ABS systems function optimally when the brake pedal is applied firmly and consistently; two-footed driving can disrupt this consistent pressure, potentially reducing the system’s ability to prevent wheel lockup.

  • Electronic Stability Control (ESC):

    ESC systems, standard in most modern vehicles, work by detecting and correcting loss of control, such as skids or spins. These systems rely on precise inputs from steering, acceleration, and braking systems to maintain stability. Two-footed driving, with its potential for erratic pedal application, can interfere with ESC functionality, potentially delaying or hindering the system’s ability to correct a loss of control. Imagine a vehicle entering a corner too quickly; ESC can apply individual brakes and adjust engine power to maintain stability. However, simultaneous accelerator and brake application can confuse the system, potentially reducing its effectiveness in preventing a skid.

  • Transmission Design (Automatic):

    Modern automatic transmissions are designed for seamless shifting and efficient power delivery based on single-foot pedal control. Applying the brake while accelerating, a characteristic of two-footed driving, can create conflicting signals for the transmission, potentially leading to increased wear and tear and compromised performance. This simultaneous application of opposing forces can strain transmission components and disrupt smooth shifting patterns. Over time, this can lead to premature transmission failure and costly repairs. The design of modern automatic transmissions inherently favors single-foot operation for optimal efficiency and longevity.

These elements of modern vehicle design collectively reinforce the importance of single-foot operation for safe and efficient driving. While the specific legal implications of driving with two feet might vary, its incompatibility with contemporary vehicle engineering underscores the potential risks and disadvantages associated with this practice. Modern vehicles are designed to respond predictably and safely to single-foot input, promoting precise control, maximizing braking effectiveness, and optimizing the performance of advanced safety systems. By adhering to recommended driving techniques that align with modern vehicle design, drivers can enhance their safety, improve vehicle performance, and minimize the risk of accidents. This harmony between driver behavior and vehicle engineering contributes to a safer and more efficient driving experience for all.

Frequently Asked Questions

This section addresses common inquiries regarding the practice of operating a motor vehicle with two feet, clarifying potential misconceptions and reinforcing safe driving practices.

Question 1: Is driving with two feet illegal?

While not universally prohibited by explicit law, driving with two feet can lead to violations of implied safe driving regulations by compromising vehicle control. Resulting unsafe behaviors, such as tailgating or causing an accident due to improper pedal control, are often subject to legal penalties.

Question 2: Why is driving with two feet discouraged?

Driving with two feet increases the risk of simultaneous accelerator and brake application, reducing braking effectiveness, increasing stopping distances, and potentially causing accidents. This practice also contributes to premature wear of braking components and can interfere with the proper function of safety systems like ABS and ESC.

Question 3: How does two-footed driving affect braking performance?

Resting a foot on the brake pedal can lead to partial brake engagement, generating friction and heat that reduces braking effectiveness when full braking force is required. This “brake fade” can significantly increase stopping distances and compromise a driver’s ability to react effectively in emergencies.

Question 4: What is the recommended method for operating pedals?

Driving instructors and safety experts universally recommend single-foot operation, where the right foot controls both accelerator and brake pedals. This method allows for precise control, optimized braking response, and minimizes the risk of simultaneous pedal application.

Question 5: How does two-footed driving impact vehicle maintenance?

The constant light braking often associated with two-footed driving leads to increased wear and tear on brake pads, rotors, and other braking system components. This premature wear necessitates more frequent replacements, increasing maintenance costs and potentially compromising braking performance.

Question 6: How does modern vehicle design relate to pedal operation?

Modern vehicles are designed with ergonomics and safety systems that support single-foot operation. The placement of pedals, the design of braking systems, and features like ABS and ESC are optimized for precise, single-foot control. Two-footed driving can interfere with these systems, reducing their effectiveness and potentially increasing the risk of accidents.

Prioritizing safe driving practices and adhering to recommended single-foot operation ensures optimal vehicle control, reduces accident risk, and promotes responsible vehicle maintenance. Understanding the potential dangers associated with two-footed driving is crucial for making informed decisions that contribute to road safety.

For further information on safe driving practices and vehicle operation, consult reputable driving schools, safety organizations, and vehicle manufacturers’ resources.

Tips for Proper Pedal Control

These tips offer guidance on proper pedal management, promoting safe and efficient vehicle operation. Focus remains on enhancing control and minimizing risks associated with improper techniques.

Tip 1: Position the Right Foot for Control: Place the right foot on the brake pedal for braking and pivot to the accelerator for acceleration. This positioning allows for smooth transitions and precise control over both pedals.

Tip 2: Avoid Resting Foot on Brake: Never rest the left foot on the brake pedal while driving. This “riding the brake” can lead to premature wear, reduced braking effectiveness, and confusion for other drivers.

Tip 3: Practice Smooth Transitions: Develop smooth transitions between accelerator and brake. Avoid abrupt movements, which can cause jerky vehicle behavior and increase the risk of accidents.

Tip 4: Focus on Single-Foot Operation: Concentrate on using the right foot exclusively for both accelerator and brake. This consistent approach enhances muscle memory and promotes predictable responses in various driving situations.

Tip 5: Maintain Proper Seating Position: Ensure a proper seating position that allows comfortable reach and control of both pedals without straining. Adjust the seat to maintain a safe distance from the steering wheel and pedals.

Tip 6: Understand Vehicle Dynamics: Familiarize oneself with the vehicle’s braking and acceleration characteristics. This understanding allows for better anticipation of vehicle responses and enhances control in different driving conditions.

Tip 7: Seek Professional Guidance: If experiencing difficulty with proper pedal control, consult a certified driving instructor for personalized guidance and practical exercises to improve technique.

Consistent application of these tips contributes to enhanced vehicle control, reduced accident risk, and prolonged vehicle lifespan. Proper pedal management is a fundamental aspect of safe and efficient driving.

By understanding the importance of proper pedal control and adopting recommended practices, drivers contribute significantly to road safety and promote responsible vehicle operation. The following conclusion summarizes the key takeaways from this discussion and reinforces the benefits of adhering to established driving techniques.

Conclusion

The question of whether driving with two feet is illegal, while relevant, often overshadows the more critical issue of safe vehicle operation. This exploration has highlighted the inherent risks associated with two-footed driving, including reduced braking effectiveness, increased accident risk, premature wear of vehicle components, and incompatibility with modern vehicle design and established driving instruction. The consensus among safety experts and driving instructors strongly favors single-foot operation for optimal control, enhanced responsiveness in emergencies, and reduced long-term maintenance costs.

Promoting proper pedal control is not merely a matter of adhering to recommended practices; it is a commitment to responsible vehicle operation and road safety. Adopting single-foot driving techniques demonstrably reduces accident risk and fosters a safer driving environment for all. Continued emphasis on driver education and adherence to established safety principles remain paramount for mitigating risks and ensuring the responsible and safe operation of motor vehicles.