TABLE 1: Existing Crossing Information

The four grade separations will be accomplished by lowering the existing railroad track within UPRR's right-of-way into a trench to pass underneath the four roadways, and constructing bridge structures above the tracks at each location. Upon completion, new Federal DOT Crossing Numbers will be assigned to the grade-separated crossings.

ACE proposes to construct the Project in a manner that will cause minimal impact to both railroad activity and surface vehicular traffic. ACE will construct a "shoo-fly" (temporary bypass track) north of the existing tracks, to divert trains away from the construction zone, but will place them within the existing railroad right-of-way. This will allow for existing track removal as well as trench excavation and shoring, while maintaining railroad operations. Once the trench and all of the street bridges are constructed, railroad operations will shift back to the new track in the trench and the shoo-fly track and temporary crossings will be removed.

Temporary Crossings

ACE proposes to construct four temporary at-grade crossings across the shoo-fly track, along the existing roadway alignment, in order to maintain vehicular access to the surrounding community and minimize vehicular delays during construction of the Project.

During actual construction of three of the four bridge structures (Ramona Street, Mission Road and Del Mar Avenue), it will be necessary to close each roadway at the railroad right-of-way. Due to local access needs, no two adjacent roadways/crossings will be closed/constructed concurrently thereby minimizing impacts to local traffic circulation. In addition, ACE will also construct temporary pedestrian-only at-grade crossings across the shoo-fly track at these three locations to provide needed pedestrian access during construction activities. The pedestrian pathway and crossings will remain open during construction of the bridge structures.

The San Gabriel Boulevard crossing will be uniquely constructed in stages to maintain one vehicular lane of travel open in each direction at all times. No separate pedestrian-only crossing will be needed at this location.

It will also be necessary to extend the shoo-fly track past the Walnut Grove Avenue at-grade crossing. Ace will construct a temporary shoo-fly crossing at this location.

The proposed warning devices for the temporary vehicular and pedestrian at-grade crossings consist of Commission Standard 9 warning devices (flashing light signal assembly with automatic gate arm) and Commission Standard 8 warning devices (flashing light signal assembly) as described below in Table 2. Additional crossing features include advance warning signage, railroad crossing pavement markings and raised median islands on the approaches.