There is a possible, albeit unlikely, route to downtown. Should the AA-Detroit service become popular and electrified in say 20 years, two potential routes to downtown exist. One is to have the service switch onto the NS Boat Line near the rouge plant, run onto an elevated ramp parallel to Jefferson, and then terminate either on Joe Louis via a tunnel under Jefferson or just short in West Riverfront Park. Another involves a new viaduct just north of Lafayette Street [[parallel), though this would require the demolition of a City Parking Bureau building. The line would cross the lodge and then turn onto Howard St over parking lots, terminating just short or under the large federal building near the Rosa Parks transit center. Any tunneling would likely bring the project to near $1 billion. A viaduct alone would probably be above $500 million but a bit below $1 billion.