PHILADELPHIA - SEPTA is officially require all riders to wear face coverings during commutes beginning Monday.Ridership is expected to increase as the region moves into the yellow phase of Pennsylvania’s reopening plan prompting SEPTA to impose the mandate on passengers.In an effort to mitigate the spread of the coronavirus, SEPTA will continue cleaning and sanitizing stations and vehicles with increased frequency. FULL COVERAGE: CORONAVIRUSAditionally, rider limits for buses and trolleys will remain to promote social distancing.SEPTA will implement the use of signs to designate seating areas while restricting some seating so passengers should sit to maintain a safe space.“As the region enters the Yellow Phase, more people will be returning.