MOT Lane Closure & Detour Planning 3

Question 1

A contractor plans to close a freeway on-ramp overnight. Which agency notification is typically required BEFORE the closure can begin?

Accepted Answer

The relevant state DOT or transportation authority

Answer

Lane and ramp closures on state or federal highways require advance approval and coordination with the state DOT, which may also notify emergency services and GPS/traffic data providers.

Question 2

Which MUTCD device category is specifically designed to physically prevent vehicles from crossing into a closed lane and can withstand low-speed vehicle impact?

Accepted Answer

Temporary concrete barrier

Answer

Temporary concrete barrier (TCB) provides positive protection by containing errant vehicles and preventing intrusion into the work area, unlike cones or panels that only guide.

Question 3

On a detour plan, the symbol 'D1' appearing in a circle on a sign typically indicates what?

Accepted Answer

A numbered detour route marker for driver guidance

Answer

Detour markers like D1, D2, D3 are sequenced route signs placed at each decision point to guide drivers along the approved detour path.

Question 4

A short-term stationary lane closure is expected to last 4 hours. Which impact attenuator setup is MOST appropriate for protecting the work space on a high-speed roadway?

Accepted Answer

Shadow vehicle with truck-mounted attenuator (TMA)

Answer

A shadow vehicle with a truck-mounted attenuator provides critical protection for workers by absorbing impact from errant vehicles on high-speed roads.

Question 5

When planning a detour around a road closure in an urban area, which factor MOST directly affects the detour's capacity to handle diverted traffic?

Accepted Answer

The level of service and lane capacity of the alternate streets

Answer

The capacity (lanes, turning movements, signal timing) and current level of service of alternate streets determines whether they can absorb the additional traffic volume without failing.

(MOT) Maintenance of Traffic Certification Practice Test

(MOT) Maintenance of Traffic Certification Practice Test

MOT Lane Closure & Detour Planning 3