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maine's transportation systems
Route Number Designations
In Maine, there are two route numbering systems used on thousands of miles of public roads. One is the US Route Numbering system and the second is the State Route Numbering system. These numbered routes exist on the Federal and state highway systems with a couple minor exceptions. However, not all State roads have a route number on them.
US Route Numbering System
The US Route Numbering system primarily exists on the National Highway System (NHS) and other arterial highways in Maine. They are governed by the American Association of State Highway Transportation Officials (AASHTO).
Whenever a change is needed on these routes, an application has to be submitted by MaineDOT to AASHTO for review and approval. Signs are typically a black number on a white shield on a rectangular sheet.
State Route Numbering System
The State Route Numbering system exists on many other miles of arterials and collector roads across the state. They are governed solely by MaineDOT. The current system has evolved over many decades and there are many overlaps and redundancies across the system. Some roads have one number on them while others may have up to 4 numbers on them simply because they intersect as they pass through Maine towns and cities. Whenever a change is needed on these routes, MaineDOT reviews the criteria for route numbering, accepts public comment, and makes a decision that provides the shortest, most direct path to the travelling public. Signs are typically a black number on a white background on a rectangular sheet.
Current US Route Numbers in Maine
Current State Route Numbers in Maine
This page last updated on 12/9/13
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