The following highways are numbered 78:
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The following highways are numbered 78:
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Waterfall Way – New South Wales State Route B78
New Zealand State Highway 78 – New Zealand's shortest State Highway
Interstate 78 
U.S. Route 78 
Alabama State Route 78 
Arizona State Route 78 
Arkansas Highway 78 
California State Route 78 
Colorado State Highway 78 
Connecticut Route 78 
Florida State Road 78 
Georgia State Route 78 
Hawaii Route 78 
Idaho State Highway 78 
Illinois Route 78 
Iowa Highway 78 
K-78 (Kansas highway) 
Kentucky Route 78 
Louisiana Highway 78 
Maryland Route 78 (former)
Massachusetts Route 78 
M-78 (Michigan highway) 
Minnesota State Highway 78 
Missouri Route 78 
Montana Highway 78 
Nebraska Highway 78 
Nevada State Route 78 (former)
New Hampshire Route 78 
County Route 78 (Bergen County, New Jersey) 
New Mexico State Road 78 
New York State Route 78 
County Route 78 (Chemung County, New York) 
County Route 78 (Dutchess County, New York) 
County Route 78 (Herkimer County, New York) County Route 78 (Jefferson County, New York) County Route 78 (Lewis County, New York) County Route 78 (Madison County, New York) County Route 78 (Monroe County, New York) County Route 78 (Montgomery County, New York) County Route 78 (Niagara County, New York) County Route 78 (Orange County, New York) County Route 78 (Steuben County, New York) 
County Route 78 (Suffolk County, New York) 
County Route 78 (Warren County, New York) 
North Carolina Highway 78 
Ohio State Route 78 
Oklahoma State Highway 78 
Oregon Route 78 
Pennsylvania Route 78 (former)
Rhode Island Route 78 
Tennessee State Route 78 
Texas State Highway 78 
Texas State Highway Spur 78 
Farm to Market Road 78 Urban Road 78 (signed as Farm to Market Road 78)
Utah State Route 78 
Vermont Route 78 
Virginia State Route 78 
Wisconsin Highway 78 
Wyoming Highway 78 | Preceded by 77 | Lists of highways 78 | Succeeded by 79 |
State Road 78 is the Florida Department of Transportation designation of the highway that historically extended from Pine Island Center on the Gulf Coast of Florida to the northern tip of Lake Okeechobee. In the 1980s, two segments of the route were removed from state maintenance to county maintenance and both were redesignated County Road 78. All three sections of SR 78 are signed east–west, even though the easternmost section is actually a north–south route.
