A route designated as “no through-trucks over 1 and ¼ ton capacity” signifies a roadway where no person shall operate a truck over that size except for the purpose of arriving at his or her destination by the most direct route from the primary, or through, truck route at the intersection that is nearest to the destination. A route designated as “no through-trucks over two axles” signifies a roadway where no person shall operate a truck over two axles except for the purpose of arriving at his or her destination by the most direct route from the primary, or through, truck route at the intersection that is nearest to the destination. A route designated as “local deliveries allowed” signifies a roadway where trucks whether trucks are permitted on the roadway for local deliveries, otherwise no trucks are permitted on those roadways for any reason. Unless otherwise specifically posted, these restrictions do not apply to the following: School buses and school bus operationsTransportation performed by the federal or District of Columbia government, a state, or any political subdivision of a state, or an agency established under a compact between states that has been approved by the Congress of the United States; Trucks that are not otherwise classified as a commercial vehicle, as defined in 18 DCMR 9901; The transportation of human corpses or sick and injured persons; The operation of police, fire, and rescue vehicles while involved in emergency and related operations; or The operation of utility, construction, or maintenance vehicles while involved in related operations for which the District has issued permits for work.