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MOUNTAIN HOUSE PROPOSED ALTAMONT HEIGI{TS TENTATIVE MAP 4. ENVIRONMENTAL CHECKLIST 4.15 TRANSPORTATION/TRAFFIC Mountain House Parkway adjacent to the Specific Plan III area will be widened to four lanes in two years (EDAW, 2005b). The California Department of Transportation(Caltrans) reported that, in 2003,the annual average daily traffic volume on I-205 was 110,000_ vehicles per day(vpd)east and west of Mountain House Parkway. Truck travel on 1-205 is relatively high(approximately 15 percent of total traffic) in the project study area(EDAW,2005b). The 1-58011-205 corridor has experienced unprecedented traffic congestion, delays, and backups in the past two decades. The increase in traffic along the corridor has been approximately 4 to 5 percent per year since 1990. If travel growth keeps pace with historical trends, travel.demand would increase by 60 percent in 10 years. Traffic-flow conditions are commonly expressed in terms of level of service (LOS), which ranges from LOS A (best) to LOS F(worst). LOS A denotes free-flow conditions with little or no restrictions to driver behavior. LOS F denotes jammed traffic-flow conditions with intolerable delays and backups during the peak hour. The existing peak-hour,peak.- directional volume (west in the morning and cast in the afternoon)on 1-205 west of Mountain House Parkway was approximately 7,800 vehicles per hour(vph) in 2003, which was LOS C. The 2010 projection for the peak hour traffic volume in the MEIR is 6,720 vph on I-205 to the west of Mountain House Parkway. Therefore,the projected 2010 peak-hour volume in the MEIR was already occurring in 2003. At the intersection of Grant Line Road and Altamont Pass Road, the existing peak afternoon(PM)traffic is extremely heavy on Altamont Pass Road due to traffic using this roadway as an alternate to the congested I-580 and I-205 freeways (EDAW, 2005b). Transportation Demand Management The 1997 Mountain House Community Transportation Demand Management(TDM) Program and Transit Plan establishes several action items to reduce traffic problems including providing the following: • a TDM coordinator; • a community telecenter(when 2,500 houses are occupied) to facilitate telecommuting; • bicycle storage and showers and lockers to promote bicycling; • bus stops located every one-quarter to one-half mile depending on land use density and the best locations for the land use they are serving; • a "Fair-share" contribution to the Altamont Pass commuter train platform; • three "park-n-ride" lots; and • encouraging employers to provide flexible work-hour programs (EDAW, 2005b). Public Transit The San Joaquin County Regional Transit District provides bus service through its Stockton Metropolitan Areas Regional Transit(SMART) system. Several daily routes are offered from Tracy to the Dublin—PleasantonLivermorearea and the San.lose—Silicon Valley area. 4-73