stationary patrol
n.— «The Missouri Highway Patrol…has begun to encourage this technique, called “stationary patrol,” as a way to conserve gasoline after prices soared in recent months. The patrol asked troopers to cut their driving by 20 percent as the agency anticipates a $2 million overrun on fuel this year.» —“Gasoline prices handcuff police patrols” by Heather Ratcliffe St. Louis Post-Dispatch (Mo.) Oct. 7, 2005. (source: Double-Tongued Dictionary)