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- Uruguay
{{about|highway routes numbered "4"|roads numbered A4|A4 roads|roads numbered M4|M4 (disambiguation)|roads numbered N4|N4 (disambiguation)|mass transit routes numbered 4|Route 4 (public transport)}}Route 4, or Highway 4, may refer to several highways in the following countries: {{TOC right|limit=3}}International- {{AHN-AH|4}} Asian Highway 4
- {{BAB-E|04}} European route E04
- {{BAB-E|004}} European route E004
- Cairo – Cape Town Highway
Albania- SH-4 road in Albania from Durres to Kakavija passing through Lushnje, Fier, Ballsh, Tepelene and Gjirokastër.
Australia- {{AUshield|NSW|M4}} M4 Western Motorway (Sydney)
- {{AUshield|NSW|A4}} Western Distributor (Sydney)
- {{AUshield|QLD|M4}} Port of Brisbane Motorway
- {{AUshield|TAS|A4}} Esk Highway, Tasmania
- {{AUshield|S|4}} State Route 4 (Western Australia) – Tonkin Highway
- {{AUshield|S|4}} Scenic Highway, Queensland
AustriaBelgiumBulgaria- A4 motorway (Bulgaria)
- I-4 road (Bulgaria)
Burma- National Highway 4 (Burma)
Cambodia- National Highway 4 (Cambodia)
Canada- Alberta Highway 4
- British Columbia Highway 4
- Manitoba Highway 4
- New Brunswick Route 4
- Northwest Territories Highway 4
- Nova Scotia Trunk 4
- Ontario Highway 4
- Route 4 (Prince Edward Island)
- Quebec Route 4
- Saskatchewan Highway 4
- Yukon Highway 4
China- G4 Expressway
- G4w Expressway (G4's branch)
Czech RepublicDjibouti- National Highway 4 (Djibouti)
FinlandGermanyHong KongIndia- {{Road marker|IN NH|4|width= 25|float=left}}National Highway 4 (India)
Indonesia- Indonesian National Route 4
IraqIsraelJapan- Japan National Route 4
- Tōhoku Expressway
- Aomori Expressway (E4's branch)
- Daini-Michinoku Toll Road (E4's branch)
- Hachinohe Expressway (E4's branch)
- Michinoku Toll Road (E4's branch)
- Route 4 (Shuto Expressway)
- Route 4 (Nagoya Expressway)
Korea, SouthMalaysia- {{JKR|4}} Malaysia Federal Route 4
NetherlandsNew Zealand- New Zealand State Highway 4
Nicaragua Norway - Norwegian National Road 4
ParaguayPhilippines- {{font color|white|blue|C-4}} Circumferential Road 4
- {{font color|white|red|R-4}} Radial Road 4
- N4 highway (Philippines)
- E4 expressway (Philippines)
RomaniaRussiaTaiwan- National Highway 4 (Taiwan)
- Provincial Highway 4 (Taiwan)
Thailand- Thailand Route 4 (Phetkasem Road)
Turkey- {{TUR-O|4}}, a motorway in Turkey running from Istanbul to Ankara.
United Kingdom- M4 motorway (Great Britain)
United States- Interstate 4
- Interstate A-4 (Alaska; unsigned)
- Interstate H-4 (former proposal)
- U.S. Route 4
- New England Interstate Route 4 (former)
- Alabama State Route 4 (former)
- Alaska Route 4
- Arkansas Highway 4
- California State Route 4
- Connecticut Route 4
- Delaware Route 4
- Florida State Road 4
- County Road 4 (Escambia County, Florida)
- County Road 4A (Escambia County, Florida)
- County Road 4 (Okaloosa County, Florida)
- County Road 4B (Okaloosa County, Florida)
- Georgia State Route 4
- Georgia State Route 4 (former)
- Idaho State Highway 4
- Illinois Route 4
- Indiana State Road 4
- Iowa Highway 4
- K-4 (Kansas highway)
- Kentucky Route 4
- Louisiana Highway 4
- Maine State Route 4
- Maryland Route 4
- Massachusetts Route 4
- M-4 (Michigan highway) (former)
- Minnesota State Highway 4 (former)
- County Road 4 (Dakota County, Minnesota)
- County Road 4 (Goodhue County, Minnesota)
- County Road 4 (St. Louis County, Minnesota)
- Mississippi Highway 4
- Missouri Route 4 (former)
- Nebraska Highway 4
- Nevada State Route 4 (former)
- New Hampshire Route 4
- New Jersey Route 4
- New Jersey Route 4N (former)
- County Route 4 (Monmouth County, New Jersey)
- County Route 4A (Monmouth County, New Jersey)
- New Mexico State Road 4
- New York State Route 4 (1924–1927) (former)
- County Route 4 (Broome County, New York)
- County Route 4 (Cattaraugus County, New York)
- County Route 4 (Chautauqua County, New York)
- County Route 4 (Chemung County, New York)
- County Route 4 (Chenango County, New York)
- County Route 4 (Clinton County, New York)
- County Route 4 (Columbia County, New York)
- County Route 4 (Dutchess County, New York)
- County Route 4 (Erie County, New York)
- County Route 4 (Franklin County, New York)
- County Route 4 (Genesee County, New York)
- County Route 4 (Jefferson County, New York)
- County Route 4 (Nassau County, New York)
- County Route 4 (Oswego County, New York)
- County Route 4 (Otsego County, New York)
- County Route 4 (Rensselaer County, New York)
- County Route 4 (Rockland County, New York)
- County Route 4 (Saratoga County, New York)
- County Route 4 (Steuben County, New York)
- County Route 4 (Suffolk County, New York)
- County Route 4 (Tioga County, New York)
- County Route 4 (Ulster County, New York)
- County Route 4 (Warren County, New York)
- County Route 4 (Wyoming County, New York)
- North Carolina Highway 4
- North Dakota Highway 4
- Ohio State Route 4
- Oklahoma State Highway 4
- Pennsylvania Route 4 (former)
- Rhode Island Route 4
- South Carolina Highway 4
- Tennessee State Route 4
- Texas State Highway 4
- Texas State Highway Loop 4
- Texas Farm to Market Road 4
- Texas Park Road 4
- Texas Recreational Road 4
- Either of two prior designations for highways in Utah
- Utah State Route 4 (1962-1977), the former designation for Interstate 70 in Utah
- Utah State Route 4 (1910-1962), the state designation for several sections of multiple U.S. Highways in the northern part of the state
- Vermont Route 4A
- Virginia State Route 4
- Washington State Route 4
- Primary State Highway 4 (Washington) (former)
- West Virginia Route 4
- Territories
- Guam Highway 4
- Puerto Rico Highway 4 (former)
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