Idle Reduction Requirement

A diesel- or gasoline-powered motor vehicle may not idle for more than three consecutive minutes, except under the following conditions: 1) to operate power takeoff equipment including, but not limited to, cement mixers, refrigeration systems, and delivery vehicles; 2) if it is a private passenger vehicle; or 3) to operate heating equipment for five minutes when the ambient temperature is 32 degrees Fahrenheit or below.

(Reference District of Columbia Municipal Regulations Title 20, Chapter 9, Section 900.1)