2-6-15 Phasing and Traffic Flow

Question 1

A __?__ is assigned to each movement of controlled traffic.

Answer 1

phase

Question 2

The sequence of the signal indications and the length of time each signal is on are controlled by the traffic signal __?__.

Answer 2

controller

Question 3

A __?__ consists of two or more sequentially timed and individually selected conflicting phases that are so arranged as to occur in an established order.

Answer 3

ring

Question 4

In a four-phase, single-ring controller, phase 1 and phase 3 can be active at the same time.

Answer 4

False

Question 5

Phases on the same ring are __?__ phases.

Answer 5

conflicting

Question 6

The timing sequence for a four-phase, single-ring controller is phase 1, then phase 2, then phase 3, then phase 4.

Answer 6

True

Question 7

A dual-ring controller can control a maximum of __?__ phases.

Answer 7

8

Question 8

The barrier in a ring diagram is a reference point in the preferred sequence of a multi-ring controller in which all rings are __?__.

Answer 8

interlocked

Question 9

The rule of the barrier states that all rings must cross the barrier at the same time.

Answer 9

True

Question 10

The barrier in a ring diagram is also known as a compatibility __?__.

Answer 10

Line

Question 11

An allowable phase combination with a dual-ring controller is phase 2 and phase 7.

Answer 11

False

Question 12

According to standard NEMA phasing for an eight-phase intersection, the side street left turn phases are __?__.

Answer 12

phase 3 and phase 7

Question 13

According to standard NEMA phase rotation, the rotation of the phase orientation counts in a clockwise direction around the intersection.

Answer 13

True

Question 14

The northbound left turn movement of traffic is always assigned to phase 1.

Answer 14

False

Question 15

Two phases that are on the same ring can be active and timing at the same time if they are both on the same side of the barrier.

Answer 15

False

Question 16

The interval for a controller to cycle from any given point in the phase timing to the same point in the phase timing on the next rotation is known as __?__.

Answer 16

cycle length

Question 17

Pedestrian movements are an extension of vehicle phases.

Answer 17

True

Question 18

What type of vehicle movement is allowed during the time pedestrians are allowed exclusive movement through an intersection?

Answer 18

no vehicle movement is allowed

Question 19

Ring diagrams do not apply to pedestrian movement.

Answer 19

False

Question 20

Standard NEMA phasing assigns odd numbered phases to __?__ movements.

Answer 20

left turn