North County Transit District
Date Started:
Sep 18, 2020
Date Completed:
Jan 31, 2022
Oceanside, CA
About Project

As of January 1, 2018, Harmon Crossing Processor (HXP) units have been designated obsolete by the manufacturer of the product, Alstom. At the time of Alstom’s decision to no longer support the HXP units and manufacturer the HXP product, inventories were made available to existing users to support the HXP platform. Alstom inventories have been depleted and spare parts for the HXP platform are limited to what materials NCTD and its Rail Operations and Maintenance Contractor, Bombardier, currently have in stock. 

Project Scope, Successes

    The San Diego Subdivision had 46 HXP units in-service at various locations; the Escondido Subdivision has approximately 120 units. This project prepared plans, specifications and estimates to replace the HXP units on the San Diego Subdivision with next generation Alstom XP4 units in the near term. The replaced HXP units will be salvaged to bolster spare part inventories for the Escondido Subdivision. Through subsequent Capital Improvement Projects, the HXP units will be phased out of operation entirely on both the San Diego and Escondido Subdivisions as funding becomes available. 

    PRE Develop plans, specifications and estimates (PS&E) for the following task:

    Task 1 - Carlsbad Crossing Improvements 

    Task 2 - San Diego Crossing Improvements 

    Task 3 -  Encinitas and Del Mar Crossing Improvements 


    30% Submittal for Tasks 1,2 and 3

    • Signal Drawings (Concept)
    • Rough Order Magnitude (ROM) Construction Cost Estimate
    • Comment Log Responses

    90% Submittal for Tasks 1,2 and 3

    • Signal Drawings by Location
    • Project Specifications
    • Construction Cost Estimate
    • Preliminary Construction Schedule
    • Comment Log Responses 

    100% Submittal for Tasks 1, 2 and 3

    • Invitation for Bid (IFB) Level Signal Drawings by Location
    • IFB Level Project Specifications
    • IFB Level Construction Cost Estimate
    • Construction Schedule
    • Reference Standards 

Project Highlights

    • PRE Develop plans, specifications and estimates (PS&E) for 21 signal locations