(a) Except as provided in subsection (b) of this section, a person may not knowingly or intentionally cause a diesel–powered motor vehicle to discharge clearly visible smoke, soot, or other exhaust emissions onto another person or motor vehicle.
(b) This section does not apply to a person operating:
(1) A diesel–powered vehicle that discharges visible exhaust as the result of normal acceleration or towing;
(2) A commercial vehicle with a gross weight of 10,000 pounds or more; or
(3) A construction vehicle operating at a construction site.
Structure Maryland Statutes
Title 21 - Vehicle Laws -- Rules of the Road
Subtitle 11 - Miscellaneous Rules
Section 21-1101 - Unattended Motor Vehicle
Section 21-1102 - Limitations on Backing
Section 21-1103 - Driving on Sidewalk
Section 21-1104 - Obstruction to Driver's View or Driving Mechanism
Section 21-1105 - Opening and Closing Vehicle Doors
Section 21-1106 - Riding in Mobile Homes
Section 21-1107 - Restrictions on Persons in Cargo Areas of Vehicles
Section 21-1108 - Coasting Prohibited
Section 21-1110 - Crossing Fire Hose
Section 21-1112 - Turning Off Lights to Avoid Identification Prohibited
Section 21-1113 - Placing Traffic Hazard Along Highway Prohibited
Section 21-1115 - Moving or Removing Lights or Guards on Highways Prohibited
Section 21-1116 - Race or Speed Contest Prohibited
Section 21-1117 - Skidding, Spinning of Wheels, and Excessive Noise Prohibited
Section 21-1118 - School Bus Regulations
Section 21-1119 - Snow Emergency Routes
Section 21-1120 - Wearing Earphones, Headsets, etc., Prohibited
Section 21-1121 - Children in Rear of Pickup Trucks
Section 21-1122 - Noise Limitations on Use of Sound Amplification Systems
Section 21-1124.1 - Text Messaging Prohibited
Section 21-1124.2 - Communications Traffic Safety Act
Section 21-1125 - Limitations on Driving Low Speed Vehicles
Section 21-1126 - Recording Illegal Activity
Section 21-1127 - Operation of Limousine of Certain Size
Section 21-1128 - Dispensing of Motor Fuel Into Dirt Bike
Section 21-1129 - Driving While Video and Electronic Display Equipment Are On
Section 21-1130 - Requirements for Operation of All-Terrain Vehicle or Snowmobile on Public Property
Section 21-1131 - Causing Diesel Emissions to Discharge Onto Another Prohibited; Exceptions