(a) No person shall drive a commercial vehicle equipped with an engine compression brake device on a highway, including residential streets, unless such commercial vehicle is also equipped with a muffler in good working order and in accordance with manufacturer's specifications and in constant operation to prevent excessive noise.
(b) For the purposes of this section, “engine compression brake device” shall mean any device that uses the engine and transmission to impede the forward motion of the motor vehicle by compression of the engine.
Structure Delaware Code
Chapter 43. EQUIPMENT AND CONSTRUCTION OF VEHICLES
Subchapter I. Equipment Requirements
§ 4302. Projections from periphery of tires; exceptions.
§ 4303. Brakes — General requirements.
§ 4304. Brakes — Performance requirements.
§ 4305. Brakes — Trailers and semitrailers.
§ 4306. Horns and other sound devices; unlawful use.
§ 4307. Warning devices for emergency vehicles.
§ 4309. Obstructions to view on windshield or windows.
§ 4311. Mufflers; cutout prohibited.
§ 4312. Safety glass — Equipment; definition.
§ 4313A. Commercial window tinting.
§ 4314. Lights and reflectors; change of original design or performance of vehicle.
§ 4315. Penalties for §§ 4301-4316.
§ 4316. Directional signal lights.
§ 4317. Protectors or flaps behind rear wheels of vehicles.