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Caltrans > Caltrans District 12 > Orange County Freeway Projects > State Route 91 Widening Project

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Map of project area



Map of Construction Limits.

What is the SR-91 Widening Project?

State Route 91 (SR-91) in Orange County was originally constructed in the 1960s as a controlled access freeway. A major effort to improve traffic capacity began in 1992 with the construction of the SR-91 toll lanes and the SR-241 toll road. The SR-91 is generally an 8- to 10- general-purpose lane freeway with auxiliary lanes. The SR-91 express/toll lanes provide two additional lanes in each direction. The toll lanes in the median are operated and maintained by OCTA (Orange County Transportation Authority) under a franchise agreement with the State. The Santa Ana River parallels the project area to the north of SR-91, and several residential and commercial communities are located south of SR-91.SR-91 is a major east-west freeway that extends from Interstate 110 (I-110) in the City of Gardena in Los Angeles County east through Orange County, where it intersects Interstates 710 (I-710), 605 (I-605) and 5 (I-5), as well as State Route 57 (SR-57), SR-55 and SR-241. SR-91 extends further northeast beyond the project limits to the City of Riverside in Riverside County. The purpose of the project is to reduce traffic congestion, improve operational deficiencies and comply with Department design standards on SR-91 between SR-55 and SR-241. The project will accomplish the following objectives:

• Enhance mid-term capacity for SR-91.
• Improve operational characteristics, such as weaving and lane efficiency at ramp junctions.
• Widen the existing 11-ft lane and 2-ft right shoulder within a portion of the project limit to the standard width of 12-ft lane and 10-ft right shoulder.

Project Area

The project area lies within the northeastern portion of the City of Anaheim and the southeastern portion of the City of Yorba Linda. There are two parallel arterial roadway corridors, La Palma Avenue and Santa Ana Canyon Road, within the project limits that are currently being utilized in lieu of SR-91. The Featherly Regional Park, the Santa Ana River and the Santa Ana River Trail border the north side of SR-91. To the south, the area is predominantly bordered by Peralta Canyon Park, and portions of a Natural Communities Conservation Program (NCCP) area. The project will cover a six-mile stretch on SR-91 with the addition of one lane on the eastbound direction from SR 55/91 interchange to east of Weir Canyon Road on-ramps; and on the westbound direction from west of SR 91/241 interchange to west of Imperial Highway (SR-90) on ramps near the cities of Yorba Linda and Anaheim.  In addition to adding a lane in each direction, a soundwall will be built on the eastbound direction beginning 2,000 feet east of Imperial Highway to about 1,000 feet west of the CHP weigh station.

Start Date

Construction began August 22, 2011. The SR-91 Widening Project and is expected to be completed by early 2013.

Project Status

Updated May 9th, 2012. Due to unforeseen operational factors or inclement weather, work activities, dates and times may change.

SR-91 Mainline

• Drainage work (removal/installation) continues on both EB and WB sides of the freeway.
• Compaction of the roadway (lane addition) will continue to take place through the span of the project behind the K-rails.  This work will be done throughout the day and night, Monday - Saturday. Residents should expect noise and vibrations as a result of construction.

Soundwall

• Work expected to last through July 2012.

Weir Canyon bridge/undercrossing

• To make room for the new lanes on the freeway, construction crews are widening the bridge. Intermittent lane reductions and nighttime lane closures of NB or SB Weir Canyon will occur. Residents may experience noise as a result of construction.

Weir Canyon Off ramps (EB and WB) and Imperial Highway WB and EB Off ramps

• Ramp Construction.
• Lanes reduced.

Imperial Highway bridge/undercrossing

•Construction crews are widening the bridge to make room for the new lanes on the freeway. Intermittent daytime lane closures and nighttime lane closures of NB or SB Imperial Highway will occur. Residents may experience noise as a result of construction.

EB 91 On-ramp from NB Lakeview Avenue

•Closed for Construction April 23 - June 7, 2012
•Detour Map Click Here

WB 91 Loop On Ramp from NB Imperial Highway

•Closed for Construction April 12th to May 24, 2012
•Detour Map Click Here

EB 91 Loop On Ramp From SB Yorba Linda Boulevard

•Closed for Construction April 9th to May 24, 2012
•Detour Map Click here

 

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