Final Initial Study/Environmental Assessment
Mitigated Negative Declaration
and Finding of No Significant Impact


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  Cover (pdf 210Kb)

 IS/EA Title Sheet (264Kb)

 Mitigated Negative Declaration (pdf 292Kb)

 Summary (pdf 413Kb)

 Project Location/ Vicinity Map (pdf 1.1 Mb)

 Final Initial Study/ Environmental Assessment
Large File (pdf 20 Mb)

List of Figures


Interstate 15 Managed Lanes Project

In the Cities of San Diego and Escondido Traffic congestion photo

from 2.4 kilometers south of State Route 163 to
0.5 Kilometers north of State Route 78

The California Department of Transportation (the Department) will improve freeway capacity and transit opportunities on Interstate 15 (I-15) by enhancing both freeway and high occupancy vehicles (HOV) facilities. A strategy called Managed Lanes is being pursued to provide capacity for buses and carpools. In addition, a value pricing program would be implemented under separate environmental approval and would allow single occupancy vehicles (SOV) to utilize excess capacity on the lanes. The managed lanes would be constructed mostly within the existing freeway median, though some outside widening is required. Some new right-of-way would be required for temporary construction easements, grading and drainage easements, retaining wall footing easements, and soil-nail and tieback easements. There would be no acquisition of homes or businesses. On the four proposed managed lanes, a moveable median barrier would be utilized that would allow for more traffic lanes in the peak direction. Traffic would flow in both directions with a minimum of one lane. Fixed concrete barriers would separate the managed lanes from the main lanes with access openings at two to three mile intervals. Five direct access ramps are also proposed. The work is located on I-15, from 2.4 kilometers (1.49 miles) south of State Route 163 in the City of San Diego to 0.5 kilometers (0.31 mile) north of State Route 78 in the City of Escondido.

The California Department of Transportation (Caltrans) is concerned about how each of its projects impacts the environment. There are laws and regulations that provide guidelines for minimizing the impacts to the environment.

This Initial Study/Environmental Assessment (IS/EA) has been written to comply with the California Environmental Quality Act (CEQA) and the National Environmental Policy Act (NEPA). The purpose of this document is to present to the public the environmental consequences of the proposed project.

This document contains the Final IS/EA and the Mitigated Negative Declaration, in which the State of California concludes that the project would have no significant impacts on the environment.