Quote:
Originally Posted by nixcity
^Yes, and I was also referring to extending the possible LR line from airport to Mueller (if approved) up to Round Rock/Pflugerville.
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I think many are confused about the differences between streetcars and light rail. Streetcars, what CapMetro is suggesting to get to the Airport from Downtown, usually stop at least every quarter mile, or every three to four blocks. Pflugerville to Downtown Austin is like 15 to 16 miles as a crow flys.
That's 60 to 64 stops along the way. How fast do you really expect any train to travel 15 miles with 4 10 second stops every mile. 40 seconds of 60 seconds for stops means 20 seconds at speed, including starting and stoping to/from a dead stop. Assuming the streetcar was traveling at maximum speed of 45 mph for that entire 20 seconds, it would average 15 mph over the entire 15 miles to Pflugerville. It'll take a full hour to go 15 miles. A streetcar going to Leander would take two hours to travel 30 miles.
No one is going to want to ride a train that stops four times a mile over that far a distance. Streetcars are best for shorter distances, where the lline is 5 miles or so. It'll take 20 minutes to travel 5 miles on a streetcar with 4 stops a mile. Where streetcars work best in Austin is Downtown, State Capital, and University of Texas areas, where passengers expect to get on and off every few blocks, and where there's a huge office building every few blocks.
Except for downtown streets, most light rail trains stop every mile or two, and therefore average much higher speeds. Regional Rail like CapMetro's Leander Line stops every 3 to 4 miles, and can average higher speeds than light rail. The further the rail line is, the larger and cheaper the train you'll want.
Light rail train cars are about twice the size as streetcars, with station stops every mile or two. Because they stop less often, they have higher average speeds. DART's light rail trains reach a top speed of 65 mph between stations placed a mile or two apart. When DART light rail trains reach downtown Dallas, they become large streetcars in operation, with stations three to four blocks apart. That's the advantage of using light rail trains, they can do either job.
Regional/Commuter trains have station placed 3, 4, 5, up to 10 miles apart. They can reach speeds up to 79 mph between stations. Since they stop much less, they have higher average speeds, some as high as 55 mph. When traveling 30 miles from Leander to downtown Austin, getting there in less than an hour during rush hour is acceptable to most commuters. A light rail train would take an hour or more to reach downtown, a streetcar up to two hours to reach downtown.
That's why Austin needs a mix of trains. Light rail trains can act as all the examples I've written above, depending upon how far apart the stations are apart. But you can't make a streetcar into a light rail train, nor make a Regional/Commuter train into a streetcar train. Each type of train is idea for a different market.
Most streetcars can sit less than 50 passengers. Most light rail cars have seats from 65 to 100 passengers. Most Regional/Commuter rail cars can sit 120-250 passengers, depending upon whether they are single or double level cars.
The market ridership predictions for each individual corridor should determine which type train to use. Using streetcars to reach Round Rock from downtown Austin is the wrong choice. Using a comuter train to move passengers a mile is the wrong choice. DFW area is using streetcars, light rail, and commuter rail today on different rail and street corridors. By the end of 2010, DFW area will also have Regional Rail added to the mix, by DCTA, and soon aftewrwards, by Ft. Worth's T.
Why, because the DFW area knows one train doesn't fit every corridor.