List of lettered highways in Maine

Lettered highways in Maine
Map
Maine's early highway system
System information
Maintained by MaineDOT
Highway names
InterstatesInterstate x (abbreviated I-X)
US HighwaysU.S. Route x (abbreviated US-X)
StateState Route x or Route x (abbreviated SR X)
Lettered routesRoute x
System links

From 1914 to 1925, Maine used a system of lettered highways to designate cross-state routes. It is unclear as to whether the system lasted through the recognition of pole-marked auto trails by the State Highway Commission in 1919, both systems were abandoned by 1925 in favor of the New England interstate highway system.[citation needed]