In a taper, what should be the maximum distance between channelizing devices?

The maximum distance between channelizing devices in a taper is equal in feet to the speed limit. This guideline is based on the principle that as vehicle speed increases, drivers require more visual cues to respond safely to changes in traffic flow. The spacing of channelizing devices—such as cones, barrels, or barricades—needs to be closely aligned with the speed at which vehicles are traveling to ensure that they can react appropriately to the tapering of lanes.

If the spacing is too wide at higher speeds, drivers may not perceive the change in road conditions in time to adjust their speed and position, potentially leading to accidents. Thus, the alignment of channelizing device spacing with the speed limit serves to enhance the effectiveness of the taper in managing traffic safety.