I-10 Twin Peaks Traffic Interchange, Environmental Assessment

Alternatives October 2005
Preferred Alternative
Constructing a Twin Peaks Road TI with I-10 as a tight diamond interchange along the
center alignment was selected as the preferred alternative. The specific improvements
associated with this alternative are discussed below and illustrated in Figure 3-6.
Proposed Roadway Improvements
Twin Peaks Road
Figure 3-6. Preferred Alternative
A new four-lane divided roadway would be constructed that would connect Twin Peaks
Road, west of the Santa Cruz River, with a new signalized intersection of El Camino de
Mañana and Linda Vista Road on the east side of I-10. A typical section (a slice across the
roadway) of Twin Peaks Road would consist of 11-foot wide inside lanes and 12-foot
wide outside lanes, as shown in Figure 3-7. Shoulders 7 feet in width that may be used by
bicycles and a 6-foot wide sidewalk would be provided on both sides of the roadway. A
raised center median that varies in width would be provided along most of Twin Peaks
Road. The median would not be provided where the roadway crosses the Santa Cruz
River, because directional traffic would be separated onto two bridge structures. The total
right-of-way width would vary between 200 and 300 feet. This roadway section would be
maintained through the intersection with Linda Vista Boulevard and then transition to a
two-lane section to match the existing roadway section of El Camino de Mañana.
Interstate 10 Traffic Interchange at
Twin Peaks/Linda Vista
3-11
Project No.: NH-010-D (AIW)
TRACS No.: 10 PM 236 H5838 01D