Processing...

`D_"total" = v * 1.5 + v ^2/(2* 0.7 *g)`

Enter a value for all fields

The **Total Stopping Distance** calculator computes the distance to stop a vehicle based on the initial velocity (**v _{i}**), reaction time (

- Choose units (default: kilometers per hour and seconds)
- Enter the initial velocity (
**v**) - Enter the Reaction Time (
**t**) - Enter the Braking Coefficient (
**μ**)

**Total Stopping Distance (TSD):** The calculator returns the distance (**TSD**) in meters. However this can be automatically converted to other distance units via the pull-down menu.

The **Total Stopping Distance** is the sum of the perception-reaction distance and the breaking distance. A common baseline value of reaction time is 1.5 seconds (`t=1.5 s`), and `mu=0.7` is used in stopping distance charts. These values incorporate the ability of the vast majority of drivers under normal road conditions. However, a keen and alert driver may have perception-reaction times well below 1 second, and a modern car with computerized anti-skid brakes may have a friction coefficient of 0.9 - or even far exceed 1.0 with sticky tires.

The breaking distance is one of two components of total stopping distance. The following formula is used to calculate the total stopping distance:

**TSD =v•t+v²/(2•μ•g)**

where:

- TSD is the total stopping distance
- v
_{i }is the initial velocity - t is the reaction time
- μ is the friction factor
- g is the acceleration due to gravity on earth

The Braking Coefficient is a coefficient of kinetic friction. For accident reconstruction on dry surfaces, a value of 0.7 is often used. This is the default value in this calculator.

**Approach (Departure) Angle:**Computes the maximum angle of a ramp onto which a vehicle can climb without scraping.**Degree to Percent Grade:**Converts a grade to a degree angle.**Camber angle**- Wheel camber (tilt) calculation of angle**Camber offset**- Wheel camber (tilt) calculation of offset**Breakover Angle:**Compute maximum angle that a vehicle can drive over without the ground touching the vehicle's undercarriage.**Time to Overtake**: Computes the time for one object to overtake another.**Distance to Overtake**: Computes distance traveled to overtake another.**Speed to Overtake**: Computes the average velocity to overtake another.**Distance Traveled**: Computes the distance traveled over a period of time.**Speed from Skid Marks**: Estimates the speed of a vehicle based on length of skid marks.**Braking Distance**: Estimates distance to stop a vehicle based on initial velocity and braking coefficient.**Total Stopping Distance**: Computes the distance to stop a vehicle based on the initial velocity, reaction time and a braking coefficient.**Speed from the Braking Distance**: Estimates the initial speed based on the distance to stop a vehicle and the a braking coefficient.**Used Car Price Comparison**: Estimates the better value between two vehicles based on their mileage, cost and expected lifespan (miles).

The formula and definition are from Wikipedia (https://en.wikipedia.org/wiki/Braking_distance).