Md. Code, Transportation § 22-302

(a) Every motor vehicle and combination of vehicles, at all times and under all conditions of loading, on application of the service brake, shall be capable of:

(1) Developing a braking force that is not less than the percentage of its gross weight tabulated in subsection (c) of this section for its classification;

(2) Decelerating to a stop from not more than 20 miles per hour at not less than the feet per second tabulated in subsection (c) of this section for its classification; and

(3) Stopping from a speed of 20 miles per hour in not more than the distance tabulated in subsection (c) of this section for its classification, this distance to be measured from the point at which movement of the service brake pedal or control begins.

(b) Tests for deceleration and stopping distance shall be made on a substantially level (not to exceed plus or minus 1 percent grade), dry, smooth, hard surface that is free from loose material.

(c) The following table sets forth the tabulations referred to in subsection (a) of this section:

1 2 3 4

Brake system

application and

Braking force distance in

as a percentage feet from

of gross vehicle Deceleration an initial

Classification of or combination in feet per speed of 20

vehicle weight second m.p.h

A Passenger vehicles with

a seating capacity of 10

people or less including

driver, not having a

manufacturer’s gross

vehicle weight rating…… 52.8% 17 25

B–1 All motorcycles…………… 43.5% 14 30

B–2 Single unit vehicles

With a manufacturer’s

gross vehicle weight

rating of 10,000 pounds

or less…………………… 31% 10 20

C–1 Single unit vehicles

With a manufacturer’s

gross weight rating of

more than 10,000

pounds………………… 43.5% 14 40

C–2 Combination of a two–

axle towing vehicle and

a trailer with a gross

weight of 3,000 pounds

or less…………………… 43.5% 14 40

C–3 Buses, regardless of the

number of axles, not

having a

manufacturer’s weight

rating…………………… 43.5% 14 40

C–4 All combination of

vehicles in driveaway–

towaway combinations… 43.5% 14 40

D All other vehicles and

combinations of vehicles

…………………………… 43.5% 14 50