Crews begin SR-86 roadway improvements A 1.5-mile road improvement project on State Route 86 in El Centro began Monday at Adams and North Imperial avenues. COURTESY PHOTO Crews closed sidewalks and lanes on State Route 86 at the intersection of Adams Avenue and North Imperial Avenue Monday to begin work on a 1.5-mile road improvement project that is expected to continue for the next two to three months. The project will cover the section of SR-86/Adams Avenue, just west of Wilson Street, to SR-86/North Imperial Avenue at Treshill Road. Construction will include sidewalk repairs, intersection treatments and thermoplastic striping and markings. Completion is anticipated in mid-August.