on April 05, 2014
The four freeway alternatives would extend SR 710 as an access-controlled freeway with a total of four travel lanes in each direction. Three of the freeway alternatives (F-2, F-5, and F-7) would be constructed in tunnels, using primarily bored tunnels with short segments of cut-and-cover tunnels to access the bored tunnel. The fourth freeway alternative (F-6) consists primarily of a combination of surface and depressed segments, with one short cut-and-cover tunnel segment. The freeways would be open to all vehicles without restrictions, except for a prohibition on hazardous materials in tunnels. Figure ES-6 illustrates the alignment of the freeway alternatives.
F-2. Alternative F-2 would originate at the existing SR 710 stub north of the I-10 freeway and connect to SR 2 between the Verdugo Road and SR 134 interchanges. The alternative would be an eight-lane freeway primarily constructed in two bored tunnels. Each tunnel would be dedicated to either northbound or southbound travel, with two lanes on each of two levels in each tunnel.
F-5. Alternative F-5 would also originate at the existing SR 710 stub north of I-10, similar to Alternative F-2, and connect to the SR 134 freeway near the Colorado Boulevard interchange. This alternative would also be an eight-lane freeway with two bored tunnels for directional travel similar to Alternative F-2. Alternative F-2 would provide interchange access to the SR 134/SR 710 interchange both to and from SR 134 for both eastbound and westbound travel and interchange access to Valley.
F-6. Alternative F-6 would also originate at the existing SR 710 stub north of I-10, but would consist of a combination of surface and depressed freeway segments, ultimately connecting to the existing SR 710 stub south of the I-210/SR 134 interchanges in Pasadena. Generally, Alternative F-6 would follow a very similar alignment to the “Meridian Variation” approved in the Record of Decision in 1998. Ramps would provide access to the freeway from Valley Boulevard, Mission Road/Alhambra Avenue, Huntington Drive, and Del Mar Boulevard.
F-7. Alternative F-7 would also originate at the existing SR 710 stub north of I-10. It would connect via a bored tunnel to the existing SR 710 stub south of the I-210/SR 134 interchanges in Pasadena. This alternative would also be an eight-lane freeway with two bored tunnels for directional travel similar to Alternative F-2.