Des Moines Register: Face coverings will be required on all DART buses beginning Aug. 23. Bus riders are encouraged to wear their own mask, and disposable masks will be available at the front of each bus, a news release said. The new policy will coincide with an Aug. 23 DART service adjustment that will restore most routes and schedules to pre-COVID-19 operations, the release said. A few local routes and express routes will increase service but continue operating at a reduced level.