[TRAFFIC SIGNAGE] State Bridge Underclearance Requirements

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Bedavd
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Joined: 31 May 2018 15:09
Location: Michigan

[TRAFFIC SIGNAGE] State Bridge Underclearance Requirements

#1 Post by Bedavd » 28 Jul 2020 03:28

This post serves as a compilation of each state's height limit for bridge clearance signs.

Each state's Department of Transportation (DOT) maintains different minimum heights before a sign denoting the clearance of the bridge is required. The MUTCD states that the signs should be used when a clearance is less than 12 inches over the maximum vehicle height limit. I've attached a few examples of clearance signs:

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A W12-2a height clearance sign for overpassing lanes of I-196 on US 131 in Grand Rapids, MI.

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A W12-2 height clearance sign for an overpassing road along I-70 in Sevier, UT. These diamond versions (W12-2) are sometimes used as stand-alone roadside signs preceeding the bridge, rather than physically attached.

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A non-standard clearance sign on overpassing lanes of I-95 in Miami, FL.

Alabama: 17 feet 0 inches or less (this one was hard to find, can be found in a note on page 20)
Alaska: 17 feet 0 inches or less
Arizona: 14 feet 6 inches or less
Arkansas: -Unable to locate- (MVH+12" = 14 feet 6 inches)
California: 15 feet 0 inches or less
Colorado: -Unable to locate- (MVH+12" = 15 feet 6 inches)
Conneticut: -Unable to locate- (MVH+12" = 16 feet 0 inches)
Delaware: Under 14 feet 6 inches
Florida: 14 feet 6 inches or less
Georgia: -Unable to locate- (MVH+12" = 14 feet 6 inches)
Hawaii: -Unable to locate- (Unable to find MVH)
Idaho: Less than 15 feet 0 inches
Illinois: -Unable to locate- (MVH+12" = 14 feet 6 inches)
Indiana: -Unable to locate- (MVH+12" = 14 feet 6 inches)
Iowa: -Unable to locate- (MVH+12" = 14 feet 6 inches)
Kansas: -Unable to locate- (MVH+12" = 15 feet 0 inches)
Kentucky: Less than 14 feet 6 inches
Louisiana: 14 feet 6 inches or less
Maine: Less than 14 feet 6 inches
Maryland: -Unable to locate- (MVH+12" = 14 feed 6 inches)
Massachusetts: 14 feet 0 inches or less
Michigan: 16 feet 0 inches or less
Minnesota: 14 feet 6 inches or less
Mississippi -Unable to locate- (MVH+12" = 14 feet 6 inches)
Missouri: 14 feet 0 inches or less on interstates
Montana
Nebraska
Nevada
New Hampshire
New Jersey
New Mexico
New York
North Carolina
North Dakota
Ohio
Oklahoma
Oregon
Pennsylvania
Rhode Island
South Carolina
South Dakota
Tennessee
Texas: 20 feet 0 inches or less
Utah
Vermont
Virginia: 14 feet 5 inches or less
Washingtion: 15 feet 3 inches or less
Washington D.C.
West Virginia: 16 feet 3 inches or less on freeways, 14 feet 6 inches or less on all other roadways
Wisconsin
Wyoming
Check out my Michigan research map!

Check out my ATS IRL map!
*IDAHO ADDED, LA, SF, and San Diego are unmapped out of protest for their future rework*

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