Maryland Route 194

Route 180） 194號馬里蘭州州道（英语：Maryland Route 194） 351號馬里蘭州州道（英语：Maryland Route 351） 355號馬里蘭州州道（英语：Maryland Route 355） 550號馬里蘭州州道（英语：Maryland Route 550）

District; Maryland Department of the Environment. Lower Susquehanna River Watershed Assessment, Maryland and Pennsylvania (PDF). Maryland Department

http://www.metro-report.com/news/single-view/view/marrakech-trolleybus-route-inaugurated.html （页面存档备份，存于互联网档案馆） Metro Report. Trolleybus Magazine (TM)

says Union Pacific System operated 8,614 route-miles at year end 1980, but the 1979 issue says 9,315 route-miles and the 1981 says 9,096, so their 1980