Summary
State Route 109 (SR 109) is a short, unsigned state highway in the U.S. state of California. It forms part of University Avenue in San Mateo County between U.S. Route 101 in East Palo Alto and State Route 84 in Menlo Park just west of the Dumbarton Bridge. Although the route is unsigned, it may be noted on some online maps.
State Route 109 | ||||
|---|---|---|---|---|
| University Avenue | ||||
 SR 109 highlighted in red | ||||
| Route information | ||||
| Maintained by Caltrans | ||||
| Length | 1.870 mi (3.009 km) | |||
| Major junctions | ||||
| South end |  US 101 in East Palo Alto | |||
| North end |  SR 84 in Menlo Park | |||
| Location | ||||
| Country | United States | |||
| State | California | |||
| Counties | San Mateo | |||
| Highway system | ||||
| ||||
Route description edit
SR 109 begins at U.S. Route 101 in East Palo Alto. It continues north, paralleling the city border with Menlo Park before entering Menlo Park and crossing a railroad. SR 109 passes by salt evaporators before terminating at SR 84 just west of the Dumbarton Bridge.[1]
History edit
In April 1958, I-109 was proposed as a name for the route that is now Interstate 280. This proposal was rejected by AASHTO.[2] The California State Route 109 designation was first defined in 1963, running from Sunset Cliffs Boulevard to Interstate 5 in San Diego. In 1972, that route was deleted and was renumbered as a western extension of Interstate 8. Later in 1984, SR 109 was defined as a route in Palo Alto.
The segment in East Palo Alto between US 101 and Notre Dame Avenue remains in local control. Under Cal S&HC § 409 (b), the state will not take control over this section until Caltrans and the city determine that it is in an "acceptable state of repair".
Major intersections edit
Except where prefixed with a letter, postmiles were measured on the road as it was when the route was established, based on the alignment that existed at the time, and do not necessarily reflect current mileage. R reflects a realignment in the route since then, M indicates a second realignment, L refers to an overlap due to a correction or change, and T indicates postmiles classified as temporary ().[2] Segments that remain unconstructed or have been relinquished to local control may be omitted. The entire route is in San Mateo County.
| Location | Postmile [2][3][4] | Destinations | Notes | ||
|---|---|---|---|---|---|
| East Palo Alto | | University Avenue | Continuation beyond US 101 | ||
| | US 101 (Bayshore Freeway) – San Francisco, San Jose | Interchange; south end of SR 109; US 101 exit 403 | |||
| East Palo Alto–Menlo Park line | 1.10 | Notre Dame Avenue | South end of state maintenance | ||
| Menlo Park | 1.87 | SR 84 (Bayfront Expressway) – Menlo Park, Dumbarton Bridge, Fremont | North end of SR 109 | ||
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi | |||||
See also edit
California Roads portal
References edit
- ^ Bay Area Metro Street Atlas (Map). Thomas Brothers. 2008.
- ^ a b c California Department of Transportation. "State Truck Route List". Sacramento: California Department of Transportation. Archived from the original (XLS file) on June 30, 2015. Retrieved June 30, 2015.
- ^ California Department of Transportation (July 2007). "Log of Bridges on State Highways". Sacramento: California Department of Transportation.
- ^ California Department of Transportation, All Traffic Volumes on CSHS, 2005 and 2006
External links edit
- Caltrans: State Route 109 highway conditions
- Caltrans Traffic Conditions Map
- California Highway Patrol Traffic Incidents
- California Highways: SR 109
- California @ AARoads.com - State Route 109