Authorities began random inspections of buses that pass through Union Station for safety violations.
They'll be looking for everything from low tire tread and engine issues to horns that don’t work.
More than 300 buses pass through Union Station daily, transporting more than 6,000 passengers.
Officials said the buses run 24 hours a day, seven days a week, which means they withstand a lot of wear and tear. They hope to searches will help them keep up with issues.