No agency is better equipped to assess LTK’s systems engineering skills than TriMet. Over the past two decades, and across seven major projects, LTK has helped TriMet create a light rail system that has earned international acclaim. Throughout this development period, LTK has served and continues to serve as TriMet’s consultant for systems engineering. This level of continuous client service is rare, and it is clear testimony to our long-standing relationship and the quality of our work. Moreover, the TriMet light rail system clearly demonstrates LTK’s sensitivity to environmental and community concerns -- we are citizens of the communities we serve.
The following are descriptions of each of the major projects in which we have been engaged; namely the:
Banfield Corridor Light Rail Project (now referred to as the Eastside Line);
Banfield Double-Tracking Project;
Westside Corridor Light Rail Extension;
Hillsboro Light Rail Extension;
Airport Light Rail Extension;
South/North Light Rail Corridor; and
Interstate Light Rail Extension.
We have also had the privilege to provide additional services to TriMet through several task order-type contracts, providing expertise in all elements of systems engineering. These have encompassed activities such as discrete design tasks, equipment modification programs, equipment tests and failure investigations, and employee maintenance training programs.
LTK has been in the forefront for signal and communications design and construction management for each of these major projects, including design of:
- Signal block layouts employing 100 Hz track circuits and trip stops
- Interlocking design
- Automatic block signal locations
- Automatic highway grade crossing warning system
- Train-to-wayside communications system
- Specialized track circuit analysis
- Signal power system(s)
- Central control facilities
- Fiber optics and data transmission system
- CCTV, telephone system, public address and variable message sign(s).
As TriMet’s Westside MAX construction progressed, regional planners turned their attention to a north-south route to extend LRT service to Clackamas County in Oregon and Clark County (Vancouver) in Washington. Funding and jurisdictional uncertainties made it clear that it would not be possible to build all 25 miles of the proposed line at once, but that an incremental approach might make it possible to build shorter parts of the line.
Studies were performed in 1999 to determine if a project was viable for an extension of the MAX system to the north, but within the City of Portland. The result was the selection of a route using Interstate Avenue, an arterial street running adjacent to I-5 and connecting with TriMet’s Eastside Line. This predominantly center-median route enjoyed broad appeal. The 5.5-mile Interstate Extension extends from a junction at the Rose Quarter Transit Center to the Portland Expo Center, and includes 10 stations.
LTK was selected to perform preliminary and final design for all systems elements, including 17 additional light rail vehicles, traction power substations, OCS, street lighting (incorporated with the OCS poles), ductbanks, signals and further expansion of the Ruby Junction maintenance facility.
Construction began in 2001 with the start of revenue service scheduled for Fall 2004. The planning process has moved on to the task of identifying a workable alignment for a minimum operable segment (MOS) from downtown Portland south to the suburb of Milwaukie.
In 2003, LTK designed and specified an upgrade to TriMet’s CCTV system which allowed TriMet to utilize their existing fiber optic infrastructure eliminating costly conduit and fiber installation.
The CCTV upgrade that LTK designed and specified was also seamlessly integrated into TriMet’s existing system while allowing TriMet to take full advantage of new digital components and gracefully retire analog components as time and budget permitted. The CCTV upgrade that LTK designed and specified has been used many times since by TriMet for claims mitigation and legal evidence.