What does the term “speed to feet” mean?
A. The cars should not move faster, in miles per hour, than the taper length in feet
B. Cones should be spread across a distance with a minimum length equal to the speed limit
C. The distance that vehicles must stop in front of you must equal the speed limit
D. The distance between channelizing devices should not exceed the number of feet equal to the speed limit
The correct answer and explanation is:
The correct answer is D. The distance between channelizing devices should not exceed the number of feet equal to the speed limit.
In traffic control and roadwork settings, the term “speed to feet” refers to a guideline used to determine the appropriate spacing between traffic control devices, such as cones, barricades, or barrels. The rule is based on the speed limit of the road. Essentially, for every mile per hour of the speed limit, the spacing between these devices should not exceed that number of feet.
For example, on a road with a speed limit of 45 miles per hour, the channelizing devices should be spaced no more than 45 feet apart. This ensures that drivers have enough warning and guidance when navigating through a work zone or a modified traffic pattern. If the devices are spaced too far apart, it may not provide adequate visual cues or control over the traffic, which can lead to unsafe conditions for drivers, workers, and pedestrians.
This principle is designed to balance the need for clear and effective traffic management with the practicalities of road space. It helps ensure that vehicles maintain proper lane discipline and that drivers have enough time to react appropriately to changes in road conditions or traffic patterns. It also contributes to the safety of construction or maintenance workers who are in proximity to moving traffic, as the spacing provides clear boundaries for the traffic flow. By following the “speed to feet” guideline, roadwork zones can be made safer for both drivers and workers alike.