N.Y. Comp. Codes R. & Regs. tit. 15, § 41.1 – Service brake standard.

(a) Brakes which can be applied to every wheel, 30 feet.
(b) Brakes which cannot be applied to every wheel, 45 feet.

The service brakes on every motor vehicle and every combination of motor vehicle and trailer, operated on a public highway under any condition of loading, shall be capable of stopping the vehicle or combination by reducing its speed at a rate sufficient to bring it to a stop from the speed of 20 miles per hour on a hard, dry, approximately level pavement, substantially free from loose material within the distances specified below: