N.Y. Comp. Codes R. & Regs. tit. 17 § 2B.108
Standard:
01 Regulatory Clearance (NYR5-6 and NYR5-7) signs (see Sign Drawing SD-R7) shall be used to indicate legal overhead clearances at bridges and elevated structures when measured overhead clearance is less than 14 feet. Such legal overhead clearance shall be one foot less than the measured clearance (the vertical distance between the traveled portion of the roadway and the overhead structure).
Support:
02 Sections 1621(c), 1640(d), 1650(c), and 1660(c) of the New York State Vehicle and Traffic Law require posting of signs informing persons of the legal overhead clearances of bridges and elevated structures when the measured clearance is less than 14 feet; legal clearance is one foot less than measured clearance.
Standard:
03 The NYR5-6 sign shall be used where there is only one approach lane. It shall also be used where there is more than one approach lane if a single clearance applicable to all approach lanes is to be indicated. Where used, the NYR5-6 sign shall be placed on, or immediately in advance of, the bridge or elevated structure.
04 The NYR5-7 sign shall be used where there is more than one approach lane, and there is a significant difference in clearance between any two of the lanes. Where used, the NYR5-7 sign shall be mounted over each lane having a measured clearance less than 14 feet, and shall be placed on, or immediately in advance of, the bridge or elevated structure. It shall be mounted over the lane to which it applies.
05 The clearance stated on the NYR5-6 or NYR5-7 sign shall be the legal clearance in feet and inches, to the nearest whole inch. The clearance stated on the NYR5-6 sign shall be the minimum legal clearance over the entire approach roadway. The clearance stated on the NYR5-7 sign shall be the minimum legal clearance over the lane to which it applies.
Option:
06 The NYR5-6 sign may be mounted either over the roadway or at the side of the roadway.
Support:
07 Overhead mounting of the NYR5-6 sign is desirable on multilane approaches.
N.Y. Comp. Codes R. & Regs. Tit. 17 § 2B.108