DMU – Pursuit of Liberty

Progression of Transit

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Hopefully the idea of growing into light rail does not come as a real surprise to anyone.

{Darrell Cook}, executive director of Mountainland Association of Governments, said if the dedicated bus system linking Utah Valley University, Brigham Young University and Provo’s East Bay works as expected, the system could, in time, be replaced by a light-rail system.

There would seem to be a natural progression for public transit that city planners could prepare for that would allow for public transit to be tailored to the current needs of a community with a defined growth potential as ridership needs increase over time. With advanced planning it should be relatively painless to meet expanding needs by starting early without investing prematurely in expensive systems.

The transition from BRT to light-rail is a last step along one line of progression, but I think there may be two progressions available. There is the regional transportation which starts with simple bus service and graduates to more complex bus service (with BRT and dedicated bus lanes etc.) before converting dedicated bus lanes into light rail – assuming that the growth and ridership supports each successive transition. Then there is the longer range transportation between metropolitan areas which starts with shuttles or express buses and eventually graduates to commuter rail or even high-speed rail. There may even be a step between the express/shuttle phase and the commuter rail phase that can be filled with DMU’s.

If early development incorporated the possibilities of future transit options then it might be easier and less costly to build and maintain transit commensurate with population.

Transit Options in Less Populous Areas

One of the problems that I have been thinking about with the growth taking place in Utah County is the balance that we need to strike between addressing the current needs and preparing for future needs, all with current resources. I am a vocal proponent of getting good transit here now and in the future, but how do you justify running light rail out to Cedar Fort when there are so few people living in Cedar Valley right now. Thankfully I was introduced to DMU’s which narrow the gap between no transit and transit that can’t be justified without large populations. DMU’s are being considered as a way to connect people outside the most populous areas of the Wasatch Front to the Frontrunner system that is being built to serve the main population bases north and south of Salt Lake City.

Essentially a DMU (diesel multiple-unit) is a single-unit self propelled vehicle that runs on rails. If the rails are compatible with light rail or commuter rail systems (and I’d like to find out if this is the case) they could be used as an introductory transit option in areas where the population is not yet dense enough to support the larger systems – especially in areas like the north and west parts of Utah County where we know that the population will become large enough to support a transit system like Salt Lake County already has. They can also be used to connect the further outlying areas with the main transit systems that serve the larger population centers.