Notes for Figure 6H-26—Typical Application 2Closure in the Center of an Intersection



  1.  All lanes should be a minimum of 10 feet in width as measured to the near face of the channelizing devices.



  1. A high-level warning device may be placed in the work space, if there is sufficient room.
  2. For short-term use on low-volume, low-speed roadways with vehicular traffic that does not include longer and wider heavy commercial vehicles, a minimum lane width of 9 feet may be used.


  1. Flashing warning lights and/or flags may be used to call attention to advance warning signs.
  2. Unless the streets are wide, it may be physically impossible to turn left, especially for large vehicles. Left turns may be prohibited as required by geometric conditions.
  3. For short-duration work operations, the channelizing devices may be eliminated if a vehicle displaying high-intensity rotating, flashing, oscillating, or strobe lights is positioned in the work space.
  4. Vehicle hazard warning signals may be used to supplement high-intensity rotating, flashing, oscillating, or strobe lights.



  1. Vehicle hazard warning signals shall not be used instead of the vehicle’s high-intensity rotatingflashing, oscillating, or strobe lights.