Back in November of 2006, DC Paratransit Info reported in the introduction of the new 6000 series MetroRail stock.

As part of that report, we noted that the new cars suffered from the same lack of signage giving priority to people with disabilities - primarily wheelchair users.

This issue is one that seems to crop up frequently with MetroRail cars. The new 6000 series cars have wonderfully open areas at either end, as well as a place that’s perfect for wheelchairs in the center - but other than the seats at the center, there is no signage indicating priority usage.