MWCOG maintains a list of regional bike on transit policies, at Commuter Connections' Bikes & Transit page. Please check each service provider's policy page for the most up-to-date bicycle policies.
Amtrak: View Amtrak's Bring Your Bicycle Onboard page
Virginia Railway Express (VRE): View VRE's Policy Page for more information about bikes on their trains
Maryland Commuter Trains (MARC): Only folding bicycles are allowed on MARC trains.
The following bus systems provide bicycle racks on the front of their buses:
MTA Commuter Bus does not provide bicycle racks but allows folding bicycles on board if enclosed in a case.