Speed management means knowing how fast to drive according to the:
Safe Following Distance
- Stopping distance required
- Shape of the road
- Traffic flow
- Condition of the road surface
- Visibility conditions
To avoid rear-end collisions, keep at least a 6-second-plus following distance when driving in ideal conditions. As your speed increases, and/or as driving conditions change, add 1 or more seconds.
Here is how to determine a safe following distance:
Know the length of your vehicle (feet) and your traveling speed.
For speeds below 40 MPH, use 1 second for each 10 feet of vehicle length.
For speeds above 40 MPH, use 1 second for each 10 feet of vehicle length, and add one more second.
Under certain conditions, always add more following distance:
It is important to remember the posted speed limit is the suggested speed limit when conditions are “ideal” and speed should always be adjusted according to conditions on the roadway.
- Add 1 second for each poor driving condition.
- Add 1 second for every 2 hours of driving time.
- Add a tailgater’s following distance to your following distance.
- Add an additional second for specified vehicles (over dimensional, doubles, tanks,
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