# List of state routes in Allegheny County, Pennsylvania

The following State Routes run through Allegheny County, Pennsylvania:

## Traffic Routes

* PA 8: One of the longest Pennsylvania state routes, this highway's southern terminus is located in Wilkinsburg, at an interchange with Interstate 376. The road then forms that borough's main street as Ardmore Boulevard, before entering Pittsburgh city limits. As the busy Penn Avenue and Washington Boulevard, the highway is a backbone of the northeastern section of the city, serving some of Pittsburgh's richest and poorest neighborhoods. After crossing the Allegheny River via the Senator Robert D. Fleming Bridge, the highway continues as the main drag through a variety of suburban communities. It is four lanes throughout and is frequently lines with businesses all the way to the Butler County line.
* US 19: An essential north-south artery, this highway enters Allegheny County from a busy and quickly growing Washington County suburban corridor. The route is generally only four lane and is often congested from well beyond the county line, as it functions as Washington Road through a variety of prestigious suburbs. After entering the City of Pittsburgh, the route is briefly co-signed with I-376, before branching off of the expressway system to cross the Ohio River via the West End Bridge. Another short freeway stretch appears immediately after crossing the river, as the highway joins with Route 65, before becoming independent once again and winding as the often two-lane Marshall Avenue and Perrysville Avenue through a variety of ethnically diverse Pittsburgh neighborhoods. The route alternates between two and four lanes as it serves dense northern suburbs such as West View, before becoming four lanes for the rest of its time in the county after rejoining with its Truck US 19 branch. The highway eventually meets with the Pennsylvania Turnpike in Marshall Township and serves a heavily commercialized corridor, as it leaves Allegheny for Butler County and an increasingly vast extended suburban area.
* US 19 Truck: This highway marks the original routing of US 19. In the 1940s, two sections of a truck bypass were built to keep heavy vehicles away from the narrow city streets on Pittsburgh's North Side. After the completion of area freeways, the truck designation became irrelevant and the two separate designations were combined. The southern terminus of the route is in the wealthy suburb of Mt. Lebanon. The highway then extends as the narrow and crowded four-lane Liberty Avenue through the dense suburb of Dormont and through Pittsburgh's south-central neighborhoods. The highway then turns to become briefly cosigned with Route 51, before hooking up with Interstates 376 and 279 to cross the Monongahela and Allegheny Rivers via the Fort Pitt Bridge and Fort Duquesne Bridge respectively. At the northern edge of city limits, the highway regains its independence, becoming the wide, four-lane, and business-lined McKnight Road for the rest of its journey. In McCandless, it rejoins its parent and meets its end.
* US 22: This major cross-country highway serves as a freeway for almost its entire path through Allegheny County. It enters the region from Washington County in the west, serving as an expressway connection with Weirton, West Virginia. For its first two miles in the county, it functions independently, before US 30 joins its routing on what is known as the Parkway West. In the busy suburb of Robinson Township, US 22/30 joins on with Interstate 376, and it is cosigned in this manner through the city of Pittsburgh and until that route's eastern terminus. On the office park-lined streets of Monroeville, US 22 branches westward, serving as a four-lane connector as it heads toward suburbanized regions in Westmoreland County.
* US 22 Bus.
* PA 28: At a confusing freeway junction in the East Allegheny neighborhood of Pittsburgh, this highway marks its western terminus. The highway begins as a narrow four-lane East Ohio Street, running in this function through the suburbs of Reserve Township and Millvale. Then, the highway transitions into the Allegheny Valley Expressway and serves as the main freeway connector for Pittsburgh's northeastern suburbs. In Harmar Township, the route intersects with the Pennsylvania Turnpike. As the route leaves Allegheny for Butler County, Pittsburgh's suburban regions transition toward rural hills, and the freeway connection continues to Kittanning.
* US 30: The famous Lincoln Highway enters Allegheny County from a sparsely portion of southern Beaver County. The first mile encompasses one of the few rural patches of Allegheny County, before the two-lane route becomes much more suburban. Soon, the highway becomes cosigned with US 22 in Findlay Township and then with Interstate 376 as it functions as a portion of the Parkway West. Along with its two associated routes, the highway travels onward through Downtown Pittsburgh and into the city's eastern suburbs as the Parkway East. In Forest Hills, the road becomes independent once again and transitions into a busy four-lane, business-lined highway. As it reaches the Westmoreland County line, suburbia continues to line the major highway all the way to Greensburg.
* PA 43: A portion of the long planned Mon-Fayette Expressway, this toll highway remains incomplete in its goal to eventually connect Morgantown, West Virginia with Pittsburgh via the Monongahela Valley. The route enters the county from a small suburban corner of riverfront Washington County, then passes on a variety of viaducts on the rolling topography above the development of Jefferson Hills. The highway currently ends at a toll plaza and junction with Route 51. Future plans call for the route to be extended to I-376 in the eastern neighborhoods of Pittsburgh, although no timetable has been set for this expansion.
* PA 48
* PA 50
* PA 51
* PA 60
* PA 60 Bus. (SR 3160)
* PA 65
* I-76
* I-79
* PA 88
* PA 121
* PA 130
* PA 136
* PA 148
* PA 148 Truck (locally maintained)
* I-279
* PA 286
* PA 366
* I-376
* PA 380 (SR 400)
* I-579
* PA 791
* PA 837
* PA 885
* PA 906
* PA 910
* PA 978
* PA 980

## Quadrant Routes

| State Route | Name | From | To | Notes |
| State Route 1001 | Butler Street, Bridge Street, Main Street, Freeport Road, Pittsburgh Street, Freeport Road, Seventh Avenue, Tenth Avenue, Freeport Road | PA Route 28 in Etna | Butler County | old PA Route 28 |
| State Route 1002 | | PA Route 28 in O'Hara Township | SR 1001 in O'Hara Township | connection between new and old PA Route 28 |
| State Route 1003 | North Canal Street, Kittanning Pike, Dorseyville Road, Kittanning Street | SR 1001 in Sharpsburg | SR 4109 in Etna |
| State Route 1004 | Seifried Lane, Kirkwood Drive | SR 1007 in O'Hara Township | SR 1003 in O'Hara Township |
| State Route 1005 | Highland Park Bridge | PA Route 28 in Sharpsburg | PA Route 8 in Pittsburgh |
| State Route 1006 | Burchfield Road | PA Route 8 (Butler St., William Flinn Hwy) in Shaler Twp | Middle Road |
| State Route 1006 | Klein Road | bridge over Little Pine Creek, Indiana | bridge over Little Pine Creek, Indiana |
| State Route 1006 | Harts Run Road, Dorseyville Road, Fox Chapel Road, Guys Run Road, Locust Hill Road | SR 1013 (Saxonburg Road), Indiana | PA Route 910 (Indianola Road), Harmar |
| State Route 1007 | Sharps Hill Road | SR 1004 (Seifried Lane) on O'Hara Township/Shaler line | SR 1003 (Kittanning Pike) on O'Hara/Shaler line |
| State Route 1008 | Gulf Lab Road, U-PARC | PA Route 910 (Indianola Road) in Harmar | SR 1015 (Russelton Road), Harmar |
| State Route 1009 | Powers Run Rd | Fox Chapel Rd, Fox Chapel | SR 1001 (Freeport Rd) in O'Hara Township |
| State Route 1010 | Harts Run Rd | PA Route 8 (Butler St., William Flinn Hwy) in Hampton | SR 1013 (Saxonburg Road), Indiana |
| State Route 1011 | Guys Run Road | SR 1006 (Locust Hill Rd) in Harmar | SR 1001 (Freeport Rd), Harmar |
| State Route 1012 | McCully Road, Cedar Run Road, Church Lane | PA Route 8 (Butler St., William Flinn Hwy) in Hampton | SR 1013 (Saxonburg Road), Indiana |
| State Route 1013 | Saxonburg Road | PA Route 8 (Butler St., William Flinn Hwy) in Shaler Twp | Butler County line |
| State Route 1014 |
| State Route 1015 |
| State Route 1016 |
| State Route 1017 |
| State Route 1018 |
| State Route 1019 |
| State Route 1020 |
| State Route 1021 |
| State Route 1022 |
| State Route 1023 |
| State Route 1024 |
| State Route 1025 |
| State Route 1026 |
| State Route 1027 |
| State Route 1028 |
| State Route 1029 |
| State Route 1030 |
| State Route 1031 |
| State Route 1032 |
| State Route 1033 |
| State Route 1034 |
| State Route 1035 |
| State Route 1036 |
| State Route 1037 |
| State Route 1038 |
| State Route 1039 |
| State Route 1040 |
| State Route 1045 |
| State Route | Name | From | To |
| State Route 2001 |
| State Route 2003 |
| State Route 2004 |
| State Route 2005 |
| State Route 2006 |
| State Route 2007 |
| State Route 2008 |
| State Route 2009 |
| State Route 2010 |
| State Route 2011 |
| State Route 2013 |
| State Route 2014 |
| State Route 2015 |
| State Route 2017 |
| State Route 2018 |
| State Route 2020 |
| State Route 2021 |
| State Route 2022 |
| State Route 2023 |
| State Route 2024 |
| State Route 2025 |
| State Route 2026 |
| State Route 2027 |
| State Route 2028 |
| State Route 2030 |
| State Route 2031 |
| State Route 2032 |
| State Route 2033 |
| State Route 2034 |
| State Route 2035 |
| State Route 2036 |
| State Route 2037 |
| State Route 2038 |
| State Route 2039 |
| State Route 2040 |
| State Route 2041 |
| State Route 2042 |
| State Route 2043 |
| State Route 2044 |
| State Route 2045 |
| State Route 2046 |
| State Route 2047 |
| State Route 2048 |
| State Route 2049 |
| State Route 2050 |
| State Route 2051 |
| State Route 2052 |
| State Route 2053 |
| State Route 2054 |
| State Route 2056 |
| State Route 2057 |
| State Route 2058 |
| State Route 2059 |
| State Route 2060 |
| State Route 2061 |
| State Route 2063 |
| State Route 2064 |
| State Route 2065 |
| State Route 2066 |
| State Route 2067 |
| State Route 2068 |
| State Route 2069 |
| State Route 2070 |
| State Route 2071 |
| State Route 2072 |
| State Route 2073 |
| State Route 2074 |
| State Route 2075 |
| State Route 2076 |
| State Route 2078 |
| State Route 2079 |
| State Route 2080 |
| State Route 2081 |
| State Route 2082 |
| State Route 2083 |
| State Route 2084 |
| State Route 2085 | Birmingham Bridge | PA Route 837 | 5th Avenue |
| State Route 2086 |
| State Route 2087 |
| State Route 2088 |
| State Route 2090 |
| State Route 2091 |
| State Route 2093 |
| State Route 2094 |
| State Route 2095 |
| State Route 2096 |
| State Route 2097 |
| State Route 2098 |
| State Route 2099 |
| State Route 2101 |
| State Route 2102 |
| State Route 2103 | Bigelow Boulevard | bridge over Seventh Avenue (PA Route 380 east) | bridge over Seventh Avenue (PA Route 380 east) |
| State Route 2104 |
| State Route 2105 |
| State Route 2106 |
| State Route 2107 |
| State Route 2108 |
| State Route 2110 |
| State Route 2112 |
| State Route 2114 |
| State Route 2116 |
| State Route 2118 |
| State Route 2120 |
| State Route 2122 |
| State Route 2124 |
| State Route 2126 |
| State Route 2128 | Tenth Street Bypass | Interstate 279; U.S. Route 19 Truck | Etna Street |
| State Route 2143 |
| State Route 2144 | Centre Avenue | bridge over Interstate 579 | bridge over Interstate 579 |
| State Route 2146 | Webster Avenue | bridge over Interstate 579 | bridge over Interstate 579 |
| State Route 2152 |
| State Route 2183 |
| State Route 2208 | Boulevard of the Allies | Interstate 279; U.S. Route 19 Truck | PA Route 885 |
| State Route 2248 |
| State Route 2308 |
| State Route | Name | From | To | Notes |
| State Route 3001 |
| State Route 3002 |
| State Route 3003 |
| State Route 3004 |
| State Route 3005 |
| State Route 3006 | Boyce Rd., Upper St. Clair Township |
| State Route 3007 |
| State Route 3008 |
| State Route 3009 |
| State Route 3010 |
| State Route 3011 |
| State Route 3012 |
| State Route 3013 |
| State Route 3014 |
| State Route 3015 |
| State Route 3016 |
| State Route 3017 |
| State Route 3018 |
| State Route 3020 |
| State Route 3021 |
| State Route 3022 |
| State Route 3023 |
| State Route 3024 |
| State Route 3025 |
| State Route 3026 |
| State Route 3027 | Smithfield Street Bridge | PA Route 837 | SR 2208 |
| State Route 3028 |
| State Route 3029 |
| State Route 3031 |
| State Route 3032 |
| State Route 3033 |
| State Route 3034 |
| State Route 3035 |
| State Route 3036 |
| State Route 3037 |
| State Route 3038 |
| State Route 3039 |
| State Route 3041 |
| State Route 3042 | Mt. Lebanon Blvd. | Washington Rd. (U.S. 19) in Mt. Lebanon | Castle Shannon Blvd. in Castle Shannon |
| State Route 3043 |
| State Route 3044 |
| State Route 3045 |
| State Route 3046 |
| State Route 3048 |
| State Route 3049 |
| State Route 3050 |
| State Route 3051 |
| State Route 3052 |
| State Route 3053 |
| State Route 3054 |
| State Route 3056 |
| State Route 3057 |
| State Route 3058 |
| State Route 3059 |
| State Route 3060 |
| State Route 3061 |
| State Route 3062 |
| State Route 3063 |
| State Route 3064 |
| State Route 3066 |
| State Route 3067 |
| State Route 3069 | Washington Road, West Liberty Avenue, Liberty Tunnel, Liberty Bridge | U.S. Route 19 | Forbes Avenue | partly signed as U.S. Route 19 Truck |
| State Route 3070 |
| State Route 3071 |
| State Route 3072 |
| State Route 3073 |
| State Route 3074 |
| State Route 3075 |
| State Route 3077 |
| State Route 3078 |
| State Route 3079 |
| State Route 3080 |
| State Route 3081 |
| State Route 3082 |
| State Route 3083 |
| State Route 3084 |
| State Route 3085 |
| State Route 3087 |
| State Route 3088 |
| State Route 3089 |
| State Route 3090 |
| State Route 3091 |
| State Route 3092 |
| State Route 3093 |
| State Route 3094 |
| State Route 3095 |
| State Route 3096 |
| State Route 3097 |
| State Route 3098 |
| State Route 3099 |
| State Route 3100 |
| State Route 3101 |
| State Route 3102 |
| State Route 3103 |
| State Route 3104 |
| State Route 3105 |
| State Route 3106 | West Carson Street | PA Route 51 | PA Route 837 | tunnels under West End Circle |
| State Route 3107 |
| State Route 3108 |
| State Route 3109 |
| State Route 3110 |
| State Route 3111 |
| State Route 3117 |
| State Route 3119 |
| State Route 3121 |
| State Route 3123 |
| State Route 3144 |
| State Route 3147 |
| State Route 3160 |
| State Route 3170 |
| State Route 3919 |
| State Route 3921 |
| State Route | Name | From | To | Notes |
| State Route 4001 |
| State Route 4002 |
| State Route 4003 | East Street, Evergreen Road, McKnight Road | Interstate 279 South Exit 4, Venture Street | Perry Highway, U.S. Route 19 | Partly signed as U.S. Route 19 Truck |
| State Route 4004 |
| State Route 4006 |
| State Route 4007 |
| State Route 4008 |
| State Route 4009 |
| State Route 4010 |
| State Route 4011 |
| State Route 4012 |
| State Route 4013 |
| State Route 4014 |
| State Route 4016 |
| State Route 4017 |
| State Route 4018 |
| State Route 4019 |
| State Route 4021 |
| State Route 4022 |
| State Route 4023 |
| State Route 4024 |
| State Route 4025 |
| State Route 4026 |
| State Route 4027 |
| State Route 4028 |
| State Route 4029 |
| State Route 4030 |
| State Route 4031 |
| State Route 4032 |
| State Route 4033 |
| State Route 4034 |
| State Route 4035 |
| State Route 4036 |
| State Route 4037 |
| State Route 4039 |
| State Route 4041 |
| State Route 4042 |
| State Route 4043 |
| State Route 4044 |
| State Route 4045 |
| State Route 4046 |
| State Route 4047 |
| State Route 4048 |
| State Route 4049 |
| State Route 4050 |
| State Route 4051 |
| State Route 4052 |
| State Route 4053 |
| State Route 4054 |
| State Route 4055 |
| State Route 4056 |
| State Route 4057 |
| State Route 4058 |
| State Route 4059 |
| State Route 4060 |
| State Route 4061 |
| State Route 4062 |
| State Route 4063 |
| State Route 4064 |
| State Route 4065 |
| State Route 4067 |
| State Route 4068 |
| State Route 4069 |
| State Route 4070 |
| State Route 4072 |
| State Route 4073 |
| State Route 4076 |
| State Route 4078 |
| State Route 4080 |
| State Route 4084 | Western Avenue, Brighton Road, Ridge Avenue, Commons, East Ohio Street | U.S. Route 19; PA Route 65; SR 3919 | PA Route 28 | former PA Route 28 |
| State Route 4086 |
| State Route 4099 |
| State Route 4133 |
| State Route 4153 |
| State Route 4154 |
| State Route 4165 |
| State Route 4265 |