Hwy 101 Widening Project Costs 

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• HomeUpHwy 101 Widening Project CostsSonoma Taxpayers $23 mil. Gift to SMARTDestFromSonomaMorn.jpg •
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          Marin - Sonoma Hwy101 Widening Project Costs

Source http://www.sonoma-county.org/SCTA/pdf/2010_constr_strategy_map_6-03.pdf
http://www.sonoma-county.org/SCTA/caltrans.htm
 

Project Cost ($ mils.) Miles Cost per Mile ($ mils.)  
1 Wilfred to Hwy. 12 28.7 ?    
2 Hwy. 12 to Steele Ln. 77.5 2    
3 RP Expwy. to Wilfred Ave. 47.8 ?    
4 Steele Ln. to Windsor River Rd 100 ?    
5 Old Redwood to RP Expwy. 100 ?    
Total 355 17 21  
         
6 Marin/Sonoma Narrows 450 12 37 This is not freeway and needs to be converted at considerably higher cost than widening an existing freeway. As this needs to happen whether SMART does or not, it should not be included in any ALTERNATIVE to SMART.
Total 921 29    

Included in the above $21 mil. per mile are the following additional tasks (not related to simply adding one lane in each direction):

  • new structures,

  • structure replacement and improvements,

  • sound walls,

  • modification to the surrounding local street network,

  • reconstruct interchanges,

  • park-and-ride lot, 

  • local street network, 

  • ramp improvements

  • auxiliary lanes,

  • improve mainline traffic operations

So the cost of simply adding YET another 2 freeway lanes, ONLY,  MUST be less than $15 mil. per mile.
This must be an alternative to compare against SMART Rail.


The following projects are included in the 2010 Construction Strategy for Highway 101 in Sonoma County. These projects will improve traffic operations and provide continuous High Occupancy Vehicle (HOV) lanes between southern Marin County and Windsor in Sonoma County.

1 Wilfred Avenue to Highway 12: This project has been constructed and HOV lanes are open to traffic. Final work related to electrical items, sound walls, and landscaping is under way. The environmental document for this project can be found at: www.dot.ca.gov/dist4/sonoma101/SON101.html

2a Highway 12 to Steele Lane: This project will add HOV lanes in each direction, ramp improvements and auxiliary lanes will also be provided to encourage HOV use and improve mainline traffic operations. The project also includes new structures, structure replacement and improvements, sound wall construction and relocation, and modification to the surrounding local street network to improve local circulation and access. Environmental approval is anticipated in 2003, and construction is anticipated to begin in 2005. For more information on this project, visit: www.dot.ca.gov/dist4/route12wpg.htm.

2b Steele Lane Interchange Improvements: This project was originally combined with the Highway 12 to Steele Lane Project, but now has a separate schedule. The project will reconstruct the interchange and add HOV lanes. Environmental approval is anticipated in 2003, and construction is anticipated to begin in 2004.

3 Rohnert Park Expressway to Wilfred Avenue: This project will add HOV lanes in each direction, add auxiliary lanes between the Rohnert Park Expressway and Wilfred Avenue Interchanges, provide ramp improvements, construct one new and modify an existing park-and-ride lot, and modify the local street network to improve access and circulation. The environmental approval is anticipated in 2005, and construction is anticipated to begin in 2006. This project is fully funded, however, construction may be delayed if state budget cuts cause funding to be held back.

4 Steele Lane to Windsor River Road: This project will add HOV lanes in each direction, ramp improvements and auxiliary lanes will also be provided to encourage HOV use and improve mainline traffic operations. Environmental assessment begins in 2003, environmental approval is anticipated in 2005, and construction is anticipated to begin in 2007. This project is funded through the environmental and design phases. GARVEE bonds are anticipated to fund the construction phase.

5 Old Redwood Highway in Petaluma to Rohnert Park Expressway: This project will add HOV lanes in each direction, ramp improvements, auxiliary lanes between SR116-Gravenstein Highway and Rohnert Park Expressway if studies show they are needed, and a northbound climbing lane along Cotati Grade. Interchange improvements at Railroad Avenue are an option. Environmental assessment begins in 2003, environmental approval is anticipated in 2005, and construction is anticipated to begin in 2007. This project is funded through the environmental and design phases. GARVEE bonds are anticipated to fund the construction phase.

6 Marin/Sonoma Narrows: This project will add HOV lanes from Highway 37 in Novato to Old Redwood Highway in Petaluma, upgrade the "Novato Narrows" section to freeway, provide interchanges and frontage roads to replace at grade intersections and driveways, and make ramp improvements. The project will be constructed in phases. Initial construction phases would provide HOV lanes and ramp improvements between Highway 37 and Atherton Avenue in Novato, and between Highway 116 (East) - Lakeville Highway and Old Redwood Highway in Petaluma. This project is funded for environmental, engineering design and right-of-way work. An additional $400 million in construction funding is still needed. Environmental approval is anticipated in 2005-2006, and construction is anticipated to begin in 2007- 2008. Given state funding issues, project delivery dates for this project may change. For more information on thisproject visit: www.dot.ca.gov/dist4/msn.

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