WASHINGTON — The normally weekday-only Virginia Railway Express is set to offer special Sunday service on Aug. 23 for fans attending an auto racing around Washington’s National Mall. The service coincides with the IndyCar Freedom 250 Grand Prix, a street race expected to bring 140,000 daily visitors to Washington during the race weekend. “VRE is thrilled to provide weekend service to our community and visitors on August 23,” VRE CEO Katie Choe said in a press release. We look forward to welcoming both longtime riders and first-time passengers on board, and using what we learn to help shape the future of VRE service.” The schedule for the Aug. 23 service is available on the VRE website.