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Project Background
As part of the proposed Interstate 5 (I-5) North Coast Widening Project, HOV lanes, auxiliary lanes, and general purpose lanes will be added to relieve congestion for 20 miles and 23 interchanges in northern San Diego County. In conjunction with the I-5 widening project, the following improvements are proposed in the City of Encinitas:
- 2 HOV lanes in both directions
- 1 general purpose lane in both directions
- A Direct Access Ramp (DAR) at Manchester Avenue
- Auxiliary lanes at various locations
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Dokken Engineering, in coordination with Caltrans and the City of Encinitas, studied and developed viable alternatives for the Birmingham Drive, Santa Fe Drive, Encinitas Boulevard, and Leucadia Boulevard interchanges along I-5. Dokken provided traffic studies, geometric alternatives, and an Alternative Comparison Matrix for each of the 4 interchanges. Caltrans and the City of Encinitas selected preferred alternatives for 3 of the 4 interchanges. The alternatives will be studied further as part of the I-5 widening project.
A preferred alternative for a 5th interchange, Manchester Avenue, was developed and studied under a separate contract with Caltrans.
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