2005 DOT
Non-standard mobility-device guidance
DOT guidance discussed Segways used by people with disabilities and the non-standard mobility-device concept in transportation settings.
Read the DOT sourceSTANDARDS HISTORY AND SOURCE CONTEXT
DOT, FTA, and DOJ Timeline
Related federal materials use different terms and contexts. They should not be collapsed into one universal rule.
2007 DOT/FTA
Roller skates analyzed as a mobility aid
The FTA BART complaint determination addressed skates in a particular transit environment. It should not be presented as categorical approval for every setting.
Read the FTA source2010 DOJ
OPDMD regulations
DOJ adopted other power-driven mobility device provisions. OPDMD is powered-device language; it is distinct from the earlier skates analysis.
Read DOJ guidanceThis generalized chronology preserves source scope and historical terminology; each authority applies only within its actual jurisdiction and context.