New York Codes, Rules and Regulations
Title 17 - DEPARTMENT OF TRANSPORTATION
Chapter V - New York State Supplement To The National Manual On Uniform Traffic Control Devices For Streets And Highways-2009 Edition
Part 4 - Highway Traffic Signals
Chapter 4C - Traffic Control Signal Needs Studies
Section 4C.08 - Warrant 7. Crash Experience

INSERT the following paragraph:

Support:

03A Types of accidents have an important bearing on the need for signalization. However, installation of a signal because of one spectacular or highly publicized accident is not justified.

Traffic control signals cannot be expected to reduce the following types of accidents:

Rear-end collisions (which usually increase after signalization);

Collisions between vehicles proceeding in the same or opposite directions where one turns across the path of the other, if no independent signal interval will be provided for these turn movements; and

Accidents involving pedestrians and turning vehicles when both move during the same "go" interval.

Traffic control signals when obeyed by drivers and pedestrians can be expected to reduce the number and severity of the following types of accidents:

Substantially right-angle collisions or those involving conflicts between vehicles which approach on intersecting highways:

Those involving conflicts between straight-moving vehicles and crossing pedestrians; and

Those involving straight-moving vehicles and left-turning vehicles approaching from opposite directions, if a protected left turn interval will be provided during the signal cycle for the left turn movement.