N.Y. Comp. Codes R. & Regs. tit. 17 § 2C.118
Option:
01 The BUSES (NYW7-18) and SLOW MOVING BUSES (NYW7-19) signs (see Sign Drawing SD-W25) may be used, as necessary, on parkways on which buses are allowed to operate. The BUSES sign may be used to provide general warning about the presence of buses; the SLOW MOVING BUSES sign may be used at upgrades and other locations where buses travel substantially slower than passenger cars.
02 The BUSES and SLOW MOVING BUSES signs may be supplemented with a Distance plaque (see Section 2C.55 ).
Guidance:
03 Where used, the BUSES sign should be placed on the main roadway of the parkway in advance of the section of parkway on which bus travel is permitted.
04 Where used, the SLOW MOVING BUSES sign should be placed in advance of the location where buses operate at low speeds.
Option:
05 Additional BUSES signs may be placed at appropriate intervals within the section. Signs may also be placed on entrance ramps.
06 Where the section of parkway containing slow moving buses is long, additional SLOW MOVING BUSES signs may be placed within it.
N.Y. Comp. Codes R. & Regs. Tit. 17 § 2C.118