SU0008578 - Laserfiche WebLink

Home Browse Search

5.ENVIRONMENTAL CHECKLIST MOUNTAIN HOUSE NEIGHBORHOODS K AND L INITIAL STUDY 15. TRANSPORTATION/TRAFFIC Existing Traffic Operations and Conditions Freeways The Mountain House project area is served by the following freeways: ■ Interstate 580(1-580)is a major east-west freeway located south of the project area and extending from Interstate 5(1-5) in San Joaquin County to State Route 101 (SR 101) in Marin County. Near the project area, 1-580 is a. four-lane divided freeway carrying approximately 35,000 vehicles per day near its interchange with Patterson Pass Road/Mountain House Parkway (Caltrans, 2009). This freeway serves as a connector between 1-5(a principal north-south freeway for both auto and truck traffic)and the Bay Area. ■ Interstate 205(1-205) is located just to the south of the Mountain House community and provides access to Tracy and to the greater San Francisco Bay Area and the Silicon Valley job centers to the west. It has six lanes in the vicinity of the Mountain House community and along its entire length. The 1-205/Mountain House Parkway interchange is located between interchanges at Eleventh Street to the east and 1-580 to the west. Currently Mountain House Parkway is generally a four-lane roadway. The 1-205 interchange is a four-lane overpass(two lanes each way). The improvements to the signalized on/-off ramp intersections at the interchange and overpass were completed in the spring of 2007. The 2009 Caltrans volume report estimates of annual average daily traffic volumes on 1-205 is 110,000 vehicles per day(vpd)east and west of Mountain House Parkway. The peak month average daily traffic volumes are 120,000 east and west of Mountain House Parkway. Truck travel on 1- 205 is relatively high (approximately 11 to 12 percent) near the project area. The existing peak-hour(2009), peak-directional volume on 1-205 in the vicinity of Mountain House Parkway is approximately 8,400 vehicles per hour(vph). Local Roads The following roads provide local access to the freeway and the immediate areas: • Byron Road is a two-to four-lane rural road that runs parallel to the Union Pacific Railroad(UPRR)and transects the northern portion of the Mountain House communityjust south of Neighborhood L. It provides access to downtown Tracy to the east and Contra Costa County to the west. Ultimately it is planned as a four-to six-lane roadway. ■ Mountain House Parkway is generally a four-lane, north-south roadway that provides a connection between 1-205 and Byron Road. It is located at the eastern boundary of a large segment of the Mountain House community. Ultimately, it is planned to be a six-lane road near Grant Line Road and an eight-lane road near 1-205. South of 1-205, Mountain House Parkway extends to 1-580 and has two to four lanes. Ism�a� 5-164