Pacific Railway Enterprises, Inc. (PRE), A Woman Owned Corporation specializing in Railroad System Design and Consulting has been in operations since May 1994, provides an array of services to our clients. PRE's staff have amassed an impressive accumulation of railroad communications and signal expertise in the areas of railroad freight, light rail, commuter and transit signal design, inspection, construction management and maintenance services.

  • A Woman Owned Corporation specializing in Railroad Signal Design and Consulting
  • Certified Small Business - CA No. 36200
  • California DBE, NAICS Codes 541330, 541340, 541512
  • Washington DBE - No. D2F0024183
  • Texas DBE/WBE - CIN #WFDB91595N0119
  • Oregon DBE/WBE - No. #8559
  • New Mexico DBE - No. 18-02-630
  • Utah DBE
  • Florida DBE
  • Massachusetts DBE

Major Project Accomplishments

SANDAG - Blue Line Crossovers


The Blue Line Crossover and Signaling Project is one of five phases in the Metropolitan Transit System's (SDMTS) Blue Line Renewal Project to replace the original infrastructure after nearly 30 years of revenue train service. The project is located on the San Diego Trolley, Inc. (SDTI) Blue Line right-of-way between the 12th and Imperial Transit Center in San Diego and the San Ysidro Trolley Station. The project’s scope includes the installation of new and existing interlocking crossovers and signal system revisions. The new systems and equipment will be installed within the existing trolley reservation with minimal service interruptions during the construction and commissioning.

Upon completion of the project, trolleys will be able to operate at Maximum Authorized Speed (MAS) in either direction on either track. This bi-directional operation will facilitate construction activities needed to raise station platforms for the future fleet of Siemens S70 Ultra-short Low Floor Light Rail Vehicles, and decreases passenger service travel times.

    Project Highlights

  • Installation of microprocessor interlocking systems, programmable audio overlay track circuitry, and fiber optic network for safety critical and maintenance data trans-mission.
  • Bi-directional operations on either track, in either direction, enabling service to continue during maintenance opera-tions and most un-planned outages.
  • Safety enhancements to 30 highway grade crossings including installation of LED lamp units, new control systems, gate mechanisms, and appurtenances.

The project requires installation of eight (8) interlocking’s, re-spacing/installation of numerous ABS signals, and upgrading train detection systems at thirty (30) highway grade crossings. In addition the project will include replacement of highway grade crossing warning devices and relocation of devices to conform to recent California Public Utility Commission (CPUC) mandates.

Pacific Railway Enterprises, Inc. (PRE) task includes development of wayside signal and highway grade crossing warning device final plans, specifications, estimates and design support during construction. At the recommendation of PRE the systems deployed will utilize modern microprocessor based interlocking controller systems installed at over 85 locations. Microprocessor based controllers enable SANDAG/MTS to incorporate service improvements at less cost and place in operation sooner than that of conventional electromechanical relay networks. Microprocessor systems utilize software to provide much of the same functional features of a relay system. Safety critical and maintenance data shall be transported from one location to the next utilizing a fiberoptic network. Maintenance personnel shall be able to evaluate service disruption causes much faster and the elimination of the relay networks will reduce FRA required tests and inspections associated with such networks.

Past SDTI signal projects have been delivered on a “design-build” basis and the Contractor responsible for development of the detailed design of the system. A design-build delivery would not support an aggressive station improvement construction schedule. The desire to expedite the construction process required PRE to provide a detailed design of systems that will enable the Contractor to meet specific milestones and allow SANDAG to award contracts for station construction. PRE’s design approach has set a standard for future projects.

Client Information



SANDAG is governed by a Board of Directors composed of mayors, councilmembers, and county supervisors from each of the region's 19 local governments. Supplementing these voting members are advisory representatives from Imperial County, the U.S. Department of Defense, Caltrans, San Diego Unified Port District, Metropolitan Transit System, North County Transit District, San Diego County Water Authority, Southern California Tribal Chairmen's Association, and Mexico. Policy Advisory Committees assist the Board of Directors in carrying out the agency’s work program. The Board of Directors is assisted by a professional staff of planners, engineers, and research specialists.