Journal of Public Transportation Article in Volume 19, Issue 2 (2016) by James A. Lenker, Uma Damle, Clive Dā€™Souza, Victor Paquet, Terry Mashtare, Edward Steinfeld. The research literature on access ramps used in transit vehicles is undermined by inconsistent methodologies used across studies, thus providing an inconclusive evidence base for proposed Federal guidelines that would.. read more ā†’