# What is the stopping distance at 30 miles an hour?

## What is the stopping distance at 30 miles an hour?

Stopping distances at different speeds

Speed Thinking + braking distance Stopping distance
30mph 9m + 14m 23m (75 feet)
40mph 12m + 24m 36m (118 feet)
50mph 15m + 38m 53m (174 feet)
60mph 18m + 55m 73m (240 feet)

136 feet

## How many feet does it take to stop a car going 40 mph?

Driver Care – Know Your Stopping Distance

Speed Perception/Reaction Distance Overal Stopping Distance
30 mph 44 feet 89 feet
40 mph 59 feet 139 feet
50 mph 73 feet 198 feet
60 mph 88 feet 268 feet

56.25 feet

120 to 140 feet

## What is the safe stopping distance?

Calculating Braking Distance Average perception/reaction time is 1.5 seconds, which translates to a distance traveled of 66 feet. Now, assuming your car has good brakes, at 30 mph, actual stopping distance required averages 45 feet. That’s a total stopping distance of 111 feet.

## What is the relationship between speed and stopping distance?

The stopping distance is proportional to the square of the speed of the vehicle. This mathematical relationship between initial speed and stopping distance is depicted in the animation below. Three cars with identical braking systems are traveling three different speeds.

## How speed can affect following distance?

Your following distance must increase the faster you are traveling. At high speeds, the total stopping distance of your vehicle will be longer. Leaving more space is essential to ensure you have time to slow, stop or maneuver in an emergency.

## What factors could affect reaction distance?

Longer reaction times increase the thinking distance when stopping from a given speed. There are different ways to measure reaction times….A driver’s reaction time can be affected by:

• tiredness.
• drugs.
• alcohol.
• distractions.

## How can you check a safe following distance?

As you count to yourself the elapsed time in seconds, the front of your car should pass the same point no less than two seconds later. If the elapsed time is less than this, increase the distance, then repeat the method again until the time is at least 2 seconds.

## How many car lengths behind someone should you be?

“Here’s the deal. Figure one car length for every ten miles an hour,” Barndt said. “So if you’re doing 55 miles an hour you should have six car lengths between you so that if something happens to the car in front of you, you have time to stop or react.”

## What is the safe distance between two vehicles?

The two-second rule is a rule of thumb by which a driver may maintain a safe following distance at any speed. The rule is that a driver should ideally stay at least two seconds behind any vehicle that is directly in front of the driver’s vehicle.

## What is the maximum speed limit for motor cycles?

After 25 years, government has revised the speed limit of vehicles on roads. Earlier the cap on speed for cabs, buses and goods vehicles was 65 kmph while it was 50 kmph for motor cycles. For the newly created category of vehicle – Quadricycle – the speed limit has been fixed at 70 kmph.

## What is the 12 second rule in driving?

Anyone operating a motor vehicle — whether its a car, truck or motorcycle — should be vigilant about watching for upcoming traffic hazards. The 12-second rule is designed to remind motorists that they need room to slow down, stop or take evasive action if something happens on the road in front of them.

## How many car lengths is 3 seconds?

3 seconds will be ~67 metres (~13 car lengths) at 80 km/h, ~42 metres (~8 car lengths) at 50 km/h, and ~25 metres (5 car lengths) at 30 km/h.

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