A traffic interchange that shifts cars from the right to the left side of the road and then back again is in the works where I-66 and Route 15 meet in Prince William County.
It’s called a diverging-diamond and it shifts vehicles to the opposite side of the road to eliminate left turns that cross into oncoming traffic. That, say traffic engineers, improves safety. Traffic signals at each end of the interchange feature only two phases, reducing “red light” time for motorists and enhancing mobility.
As part of this diverging-diamond interchange, the project will include constructing:
- Two longer bridges to carry U.S. 15 over I-66 with two crossover intersections;
- Ramp improvements (including a spur ramp to ease traffic flow from westbound I-66 to northbound U.S. 15 to westbound Heathcote Boulevard);
- Improvements on U.S. 15 from just north of the railroad tracks to just south of Heathcote Boulevard;
- Wider intersections on U.S. 15 at Heathcote Boulevard and Route 55, adding turn lanes to both; and
- A 10-foot-wide shared-use path on the east side of U.S. 15 for pedestrians and bicyclists.
VDOT will be holding meetings about the Haymarket interchange on Wednesday, Dec. 7 and Tuesday, Dec.13 in the Bull Run Middle School cafeteria, 6308 Catharpin Road, Gainesville, VA. Both meetings start at 6:30 p.m. and feature a brief presentation at 7 p.m. and an interactive DDI walk-through.