found: Work cat.: Assessment of accidents and HOV/shoulder travel lane use on I-95 from Route 644 to Route 1 north of Woodbridge in Fairfax County, 1988:p. 2 (shoulder travel use) p. 3 (shoulder travel lane)
found: Safety evaluation of part-time shoulder lane and ramp control on the Santa Ana Freeway southbound between Route 605 and San Antonio Drive on-ramp, 1976.
found: Bus use of shoulders, 2006:p. 22 (bus drivers were initially uncertain about operating in shoulder lanes; deadheading buses are allowed to use shoulder lanes. Use of shoulder lanes has had positive effect on ridership)
found: Convertible roadways and lanes : a synthesis of highway practice, 2004(convertible lanes and roadways, facilities on which traffic operations are adapted to changing traffic conditions; may take place in a single lane, the entire roadway, or even on the shoulders)
