SR 05:240 - Laserfiche WebLink

Other Street Segments/Alternatives to be Studied The outreach stage of the General Plan review identified three streets where local concern suggested review of the planned network. These are: · Golf course by-pass road (assumed in all altematives) · Sycamore Creek extension to the Lund Ranch Road · Hearst Drive extension to the remainder of Kottinger Ranch with proposed Oak Grove project The issues with these streets revolve around local street quality-of-life, acceptable local/collector street volumes, speeds, and the land uses feeding traffic to them. These issues will be discussed under the policy section of the planned review of the Circulation Element. In the meantime, review of these roadways is pm of development proposal reviews which are on going and which will be more fine-grained than the initial reviews of other streets included in this report. Other roadway improvements are possible. The West Las Positas Interchange Committee suggested alternative widenings (e.g. Stoneridge east of 1-680 as a six-lane medal with interchange capacity increases). Creative solutions for Stoneridge (e.g. HOV lane, underpass) and for the Valley-Santa Rita intersection (e.g. fly-over/underpass) have also been suggested as options. Summary Comparison of Alternative Circulation Networks Alternative A has 21% less morning congestion but 29% more evening congestion than the existing baseline conditions. LOS E and F intersections are reduced by four in the mornings, but are increased by one in the afternoons. Compared to Alternatives B and C, Alternative A has more LOS E and F intersections and more average city-wide delay. Regarding average arterial delays, Alternative A routes are projected to have increased delay relative to the existing conditions (with notable exceptions for morning westbound/southbound travel). Average overall delay, both directions, for selected routes is about 10 percent greater than at present, about the same as for Alternative B but about 3 percent worse than Alternative C. Alternative B produces about a 6% less overall city-wide delay at intersections in the morning and 11% less in the afternoon compared to the Alternative A network. Alternative B has more delay and more LOS E or F intersections than Alternative C. There are two fewer LOS E or F intersections than Alternative A, but one remains in the morning and six in the afternoon. Alternative B overall has about 11 percent more delay on these arterial routes (both directions) than existing conditions. Its routes in the aggregate have slightly more delay than the equivalent land use scenario on the Alternative A network. The eastbound afternoon direction is the most congested, with morning and westbound afternoon medal levels of service typically at LOS C and D. 28