Based on feedback from this post, I’ve modified the map of Metrobus routes that use articulated buses.

Here is the updated route list.

• Many peak period buses are articulated:
  • 70 and 71 – Georgia Ave in DC
  • Y series – Georgia Ave in MD
  • S1 – 16th St
  • X2 – H St
  • Z series – Colesville Rd (shown truncated on the map)
• Occasionally articulated:
  • S2 – 16th St
  • J2 – East West Hwy / Old Georgetown Rd
  • C2 and C4 – University Blvd
  • K6 – New Hampshire Ave
  • R2 – Riggs Rd
• Rarely articulated:
  • L2 – Connecticut Ave
  • 5A – Dulles Airport
  • B30 – BWI Airport

Feel free to post additional comments / corrections.