Metro Crenshaw / LAX Transit Corridor Project

Agency: Los Angeles Metropolitan Transportation Authority (LACMTA)

Soteria’s Role: System safety and security planning, analysis, and security. Reliability, availability, and maintainability.

Completion Date: Three phases completed 2022 – 2024

Project Overview

The Metro Crenshaw/LAX Transit Corridor project is an 8.5-mile light commuter rail line that will run between the Expo Line on Exposition Boulevard and the METRO Green Line. The southern end of the new line will follow along a portion of an abandoned BNSF freight line until it reaches the intersection of West 67th Street and Crenshaw Blvd. From the intersection of West 67th Street and Crenshaw Blvd, the line will continue north along Crenshaw Blvd where it will ultimately tie in to the Expo line at West Exposition Blvd.
Additional construction elements of the project consist of 5.5 miles of at grade track with 16 grade crossings, 3600’ of bridge, 4600’ of U-wall, 4700’ of cut & cover trench and 6000’ of bored tunnel. Systems for the project will include 10 Traction Power Sub-Stations, train control and signals, traffic signals and grade crossing protection, communications and a Metro furnished and installed fare collection system.

The Crenshaw/LAX Transit Project will serve the Crenshaw District, Inglewood, Westchester and surrounding area with the following eight stations

Expo/Crenshaw
Martin Luther King Jr.
Leimert Park
Hyde Park
Fairview Heights
Downtown Inglewood
Westchester/Veterans
Aviation/Century

Soteria’s Contribution

Soteria provided a technical review of the completed and verified Design Criteria Conformance Checklists for the following systems:

Signaling System
Communications
WiMax
Traction Power Substations
Overhead Catenary System

Comments were provided to the responsible designers for the final update and certification of the checklists. Reliability and maintainability analyses were carried out for four existing corridors and three new corridors under design.

Sample As-Built drawings were analyzed from the existing corridors to provide a component list. The components and quantities, according to the As-Built drawings, were entered into the analysis database, which had been populated with the failure rates for most components. Failure rates for components without manufacturer’s data were assigned failure rates from similar equipment. The major components are from manufacturer-provided data.

A typical Siemens Traction Power Substation configuration was assumed for all substations, using data existing “As Built” drawings and data gathered from the analysis of similar transit systems.

The Communications equipment counts are based on the Systems Major Subsystem Component List provided by VMR Systems staff, supplemented by information from the drawing sets

To determine part counts for the new corridors, IFC, 60% and preliminary drawings were used. Typical signaling configurations were used as actual equipment has not been ordered at the time of the report. Typical Siemens TPSS were again assumed in these corridors.

The component and configuration data were compiled in a RAM database to produce the following reports:

Reliability Analysis for the existing four corridors, showing totals for all four corridors for each subsystem
Reliability Analysis for the three new corridors, showing totals for all three corridors for each subsystem
FMECAs for the Signaling System for the three new corridors

List of systems included in the reports: