It is very hard to transfer at places such as L'Enfant Plaza when people are standing all over the platform. Please paint a walking path only from the escalators (up from Orange, etc.) along the Yellow/Green platform to the escalators at the end of the platform. People can still stand in front of or behind the aisle markers, but we need a path to walk in safely and efficiently.
Put marked walking aisles for traffic between the entrances and escalators, especially along the platforms.
This would allow people making transfers, or going to the ends of the trains a more efficient flow.
Currently people are standing all over the place and it is hard to move through the crowd.