15-minute duration would require closure of at least 5 miles of mainline roadway at a 20-mph pace and 3.75 miles at a 15-mph pace plus buffer space, set-up and deceleration distance.Īny on-ramps within the required distance must be closed and traffic either detoured or adequate storage for queued traffic provided on the ramp. The selection of the speed of the roadblock should consider the work duration and the location of upstream on-ramps which need to be closed but should generally be 15 mph or greater. The permittee/contractor should be required to demonstrate that they will deploy the resources necessary to complete the work within the specified time period. Work duration should be kept to a minimum, no more than 15 minutes. Periods of lightest traffic to minimize impacts.Start in a tangent section with adequate sight distance.Number and location of entrance ramps requiring closures.Projected travel time of rolling roadblock - 15 mph= 1 mile in 4 minutes.Clearance time for last uncontrolled vehicle to pass by work area.When determining where/when to start the rolling roadblock, consider the following: Prior to implementing a Rolling Roadblock A simpler variation has also been used for post-storm clean-up on elevated segments of freeways with close echelon plowing to pull built-up snow from median barriers to the right side of roadway.Cable, overhead sign structure, bridge beam, traffic counter tubes, pavement monitoring devices etc.) is being strung/placed across the highway or to change a traffic pattern in a temporary traffic control zone. Slowing and pacing upstream traffic at the reduced speed to create a downstream gap in traffic of sufficient duration to accomplish the work in the roadway.A shoulder of 8 foot or greater width, possibly assisted by police.A rolling road block (also known as a “Slow Roll” or a “Rolling Slowdown”) is a means of slowing and controlling traffic to clear a section of roadway and allow a work operation which requires short duration access to an entire roadway (typically a freeway or other controlled access highway).
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