2 Del. Admin. Code § 6F.84

Current through Register Vol. 27, No. 11, May 1, 2024

Section 6F.84 - Temporary Traffic Control Signals

Standard:

01 Temporary traffic control signals (see Section 4D.32) used to control road user movements through TTC zones and in other TTC situations shall comply with the applicable provisions of Part 4.

01A (DE Revision) All temporary traffic control signals along state-maintained roadways shall have a signal plan approved by DelDOT Traffic.

Support:

02 Temporary traffic control signals are typically used in TTC zones such as temporary haul road crossings; temporary one-way operations along a one-lane, two-way highway; temporary one-way operations on bridges, reversible lanes, and intersections.

Standard:

03 A temporary traffic control signal that is used to control traffic through a one-lane, two-way section of roadway shall comply with the provisions of Section 4H.02.

Guidance:

04 Where pedestrian traffic is detoured to a temporary traffic control signal, engineering judgment should be used to determine if pedestrian signals or accessible pedestrian signals (see Section 4E.09) are needed for crossing along an alternate route.

05 When temporary traffic control signals are used, conflict monitors typical of traditional traffic control signal operations should be used.

Option:

06 Temporary traffic control signals may be portable or temporarily mounted on fixed supports.

Guidance:

07 Temporary traffic control signals should only be used in situations where temporary traffic control signals are preferable to other means of traffic control, such as changing the work staging or work zone size to eliminate one-way vehicular traffic movements, using flaggers to control one-way or crossing movements, using STOP or YIELD signs, and using warning devices alone.

Support:

08 Factors related to the design and application of temporary traffic control signals include the following:

A. Safety and road user needs;

B. Work staging and operations;

C. The feasibility of using other TTC strategies (for example, flaggers, providing space for two lanes, or detouring road users, including bicyclists and pedestrians);

D. Sight distance restrictions;

E. Human factors considerations (for example, lack of driver familiarity with temporary traffic control signals);

F. Road-user volumes including roadway and intersection capacity;

G. Affected side streets and driveways;

H. Vehicle speeds;

I. The placement of other TTC devices;

J. Parking;

K. Turning restrictions;

L. Pedestrians;

M. The nature of adjacent land uses (such as residential or commercial);

N. Legal authority;

O. Signal phasing and timing requirements;

P. Full-time or part-time operation;

Q. Actuated, fixed-time, or manual operation;

R. Power failures or other emergencies;

S. Inspection and maintenance needs;

T. Need for detailed placement, timing, and operation records; and

U. Operation by contractors or by others.

09 Although temporary traffic control signals can be mounted on trailers or lightweight portable supports, fixed supports offer superior resistance to displacement or damage by severe weather, vehicle impact, and vandalism.

Guidance:

10 Other TTC devices should be used to supplement temporary traffic control signals, including warning and regulatory signs, pavement markings, and channelizing devices.

11 Temporary traffic control signals not in use should be covered or removed.

12 If a temporary traffic control signal is located within 1/2 mile of an adjacent traffic control signal, consideration should be given to interconnected operation.

Standard:

13 Temporary traffic control signals shall not be located within 200 feet of a grade crossing unless the temporary traffic control signal is provided with preemption in accordance with Section 4D.27, or unless a uniformed officer or flagger is provided at the crossing to prevent vehicles from stopping within the crossing.

2 Del. Admin. Code § 6F.84