Delaware Administrative Code
Title 2 - Transportation
2000 - Department of Transportation
2400 - Division of Transportation Solutions
2402 - Manual on Uniform Traffic Control Devices (MUTCD)
Part 6 - Temporary Traffic Control
Chapter 6G - TYPE OF TEMPORARY TRAFFIC CONTROL ZONE ACTIVITIES
Section 6G.22 - Rolling Road Block Operations
Current through Register Vol. 28, No. 3, September 1, 2024
Support:
01 (DE Revision) Figure 6H-35H is an example of a rolling road block for limited access multilane divided roadways.
| Table 6G-1. Vertical Difference (Delaware Revision) | |||||
| Type of Vertical Difference | Criteria | Height (H) of Vertical Difference | |||
| H = 1 in | 1 in < H = 2 in | 2 in < H = 6 in | H > 6 in | ||
| Longitudinal <= 10 ft from edge of traveled way1 | Standard | No channelizing devices required | - For differences along or between traveled ways, the UNEVEN LANES (W8-11) sign shall be used - For differences between the traveled way and shoulder or at the edge of pavement, the LOW SHOULDER (W8-9) sign shall be used | - No shoulder or shoulder < 4 ft wide: If the vertical difference is not eliminated by the end of the work day, a 4 to 1 fillet of wedge material shall be placed or temporary traffic barrier shall be installed. During the day of construction, channelizing devices shall be used to delineate the vertical difference until the vertical difference is eliminated, a 4 to 1 fillet of wedge material is placed, or temporary traffic barrier is installed. - Shoulder = 4 ft wide: Drums shall be used to delineate the vertical difference for up to 5 calendar days. If the vertical difference is not eliminated by the end of the 5th calendar day, a 4 to 1 fillet of wedge material shall be placed or temporary traffic barrier shall be installed. - The Shoulder Drop Off (W8-17) sign shall be used until the vertical difference is eliminated | If the vertical difference is not eliminated by the end of the work day, a 4 to 1 fillet of wedge material shall be placed or temporary traffic barrier shall be installed. |
| Guidance | - For differences between the traveled way and shoulder or at the edge of pavement, wedge material is not required if the vertical difference exists for less than 5 calendar days. If the vertical difference is not eliminated by the end of the 5th calendar day, a 4 to 1 fillet of wedge material should be placed. - Throughout the duration of the vertical difference condition, drums should be placed between the traveled way and shoulder or along the edge of pavement | ||||
| Option | TTC devices and correction may be omitted for new pavement surfaces with the Safety Edge | ||||
| Longitudinal > 10 ft to <= 30 ft from edge of traveled way1,2 | Standard | No channelizing devices required | No channelizing devices required | - Throughout the duration of the vertical difference condition, drums shall be placed between the traveled way and shoulder or along the edge of pavement - If the vertical difference is within the traveled way or shoulder, the Shoulder Drop Off (W8-17) sign shall be used until the vertical difference is eliminated | Throughout the duration of the vertical difference condition, drums shall be placed between the traveled way and shoulder or along the edge of pavement |
| Guidance | Temporary traffic barrier should be considered | ||||
| Transverse | Standard | No channelizing devices required | - Except for roadway obstacles such as manholes and utility valves, BUMP (W8-1) or DIP (W8-2) signs shall be installed - A ramp of bituminous temporary roadway material shall be installed at a slope of 20 to 1 across the limits of the vertical difference, including the perimeter of an obstacle | - Except for roadway obstacles such as manholes and utility valves, BUMP (W8-1) or DIP (W8-2) signs shall be installed - A ramp of bituminous temporary roadway material shall be installed at a slope of 20 to 1 across the limits of the vertical difference, including the perimeter of an obstacle | - Except for roadway obstacles such as manholes and utility valves, BUMP (W8-1) or DIP (W8-2) signs shall be installed - A ramp of bituminous temporary roadway material shall be installed at a slope of 20 to 1 across the limits of the vertical difference, including the perimeter of an obstacle |
| 1 - Per Section 1A.13, the traveled way is defined as the portion of the roadway for the movement of vehicles, exclusive of the shoulders, berms, sidewalks, and parking lanes | |||||
| 2 - Channelizing devices are not required if the vertical difference is located behind guardrail, barrier, or vertical curb | |||||
| Table 6G-2. Storage of Equipment (Delaware Revision) | |||
| Road Type | Distance (L) from Edge of Traveled Way | Posted Speed Limit or 85th-Percentile Speed | Minimum Required Channelizing Devices |
| Equipment and Non-flammable Materials | |||
| Interstate, Freeway, or Expressway | L <= 30 ft | All | Temporary traffic barrier |
| L > 30 ft | All | Drums | |
| All other roadways | 0 <= L <= 10 ft | 25 mph or less | Drums |
| More than 25 mph | Temporary traffic barrier | ||
| 10 ft < L <= 30 ft | 25 mph or less | None | |
| More than 25 mph | Drums | ||
| L > 30 ft | All | None | |
| Flammable Materials (fuel, propane, etc.) | |||
| Interstate, Freeway, or Expressway | L <= 30 ft | All | Temporary traffic barrier |
| L > 30 ft | All | Drums | |
| All other roadways | L <= 30 ft | All | Temporary traffic barrier |
| L > 30 ft | All | None | |
02 (DE Revision) Activities which may warrant the use of a Rolling Road Block operation include, but are not limited to: setting of bridge beams, pulling wires or cables across the roadway, placing overhead or cantilever signs and sign structures and performing traffic switches from one half of the roadway to the other half.
Standard:
03 (DE Revision) With the exception of emergencies, any rolling road block operation used on state maintained roadways shall be approved by DelDOT's Traffic Section prior to use and shall be performed as outlined in this Section and in Typical Application 35H.
04 (DE Revision) Rolling road block operations shall only be performed during non-peak travel periods and must be planned to not exceed periods of 15 minutes in duration.
05 (DE Revision) Prior to utilizing a rolling road block operation, a coordination meeting shall be held with all entities involved in the operation to discuss each entity's role.
06 (DE Revision) The performance of rolling road block operations shall include the use of Delaware State Police (DSP) or local police depending upon jurisdiction. Police vehicles shall be placed as shown in Figure 6H-35H.
07 (DE Revision) At a minimum, a portable changeable message sign (PCMS) shall be used a minimum of 1 mile and 2 miles in advance of the beginning of the rolling road block operation with the following message: STOPPED VEHICLES AHEAD; BE PREPARED TO STOP.
08 (DE Revision) A control vehicle shall occupy each travel lane of the route affected by the rolling road block operation. All entrance ramps within the rolling road block operation shall be temporarily closed. A drive through of the route shall be performed prior to beginning the rolling road block operation.
09 (DE Revision)Determining where to begin a rolling road block operation shall include an evaluation of all factors unique to the road system in question. At a minimum, the following items shall be considered in the evaluation:
10 (DE Revision) Upon a sufficient gap in traffic, each slow roll vehicle will pull out and occupy a travel lane with their warning lights, hazard lights and arrow board operating and with a truck-mounted attenuator in the crash attenuating position.
11 (DE Revision) The lead vehicle in the rolling road block operation shall have radio/telephone communication with the work crew. Once the need for the road closure is complete, the work crew shall notify the lead control vehicle who in turn will notify the other control vehicles. The rolling road block vehicles shall gain speed and pull over to the right side of the roadway; staring with the control vehicle occupying the left lanes first.
12 (DE Revision) If the rolling road block operation vehicles reach the work site before receiving notification that the operation has been completed, they shall slow down and/or stop until signaled that the roadway is safe to release traffic.
13 (DE Revision) Once the rolling road block operation is complete and free flow travel conditions have been re-established, the PCMS messages shall be removed by blanking the message boards or turning them away from traffic.
Option:
14 (DE Revision) For emergency situations, truck-mounted attenuators may be omitted from control vehicles, portable changeable message signs, and law enforcement personnel may be omitted from the rolling road block operation.
15 (DE Revision) Emergency situations include but are not limited to removing debris from the roadway, removing a disabled vehicle from the roadway or other similar type of event.
