Let's take a peak at some other trains that travel from airports to city centers (and points in between).
http://www.youtube.com/watch?v=P4mfENawgNs The trip from Nippori Train Station to Narita Airport terminal two. Top speed 160km/h (99 mph)
This is an express train-note that it passes numerous stations, something which the Airport line should have the option to do. The line is multipurpose, i.e., the line is not confined to airport traffic- there are local trains on the line.
The Airport Line should concentrate on more frequent service from Peoria Station to Lodo during rush hours. This would require one extra commuter rail track at that station. Every effort should be made to develop traffic at Peoria, Central Park, 40th/Colorado, and, 38th and Blake. Peoria should be developed into a platform to platform via tunnel or pedestrian overpass connections.
Perhaps the best airport commuter opportunities, outside of those who are dropped off at East line stations, will be those who use bus services. Perhaps a 35 minute bus radius into the DUS train station would be max, but, again this removes most potential riders who must transfer between buses to get to DUS, and, further reduces the number of riders based upon how long getting to a bus stop, waiting for the bus, transferring between buses etc. (This also applies to feeder bus services into the I-225 Rail line.)
In my opinion unless commuter traffic is targeted via good user interfaces and more frequent service from Peoria Station to DUS, the costs of the East line will not be recaptured.
The DUS-Bus-Light Rail Complex is, as I have always maintained the weak link in the entire system, which can only be remedied now at titanic expense via elevated or buried southbound heavy rail connections and by extending the light rail through the light rail station at DUS further east to 39th and Blake, perhaps looping with the light rail extension from 30th and Downing to 38th and Blake already planned.
Of course, nothing that logical will be built anytime soon, and, when, and if, such changes are made many, many billions will need to be spent, new (between 1998 and 20??) buildings demolished.
Then we will have a world class system (with too many steps to enter and exit trains, but that is another story.)
Remember that a huge percentage of those traveling to DIA will be at least 80 minutes away by public transportation, outside of those who live close to the DUS Station complex, even after the East line is completed. This includes most of the metro area West of 1-25, and, those fortunate enough to be within 10 minute travel distance to the W line, West of Wadsworth. Most will not be so lucky, and, public transportation times will be even longer.
However, this is tempered by a correct argument which can be raised about the time value cost of money involved in saving parking fees, with the airports long term parking taking a beating. This is a time-value-cost-of money judgment, which, IMO would involve time periods over 3 days.
(I do grant the bragging rights by the powers at be that Denver will have a rail line to Lodo..)
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One of the most beautiful trains in history had it's first run in 1997. The JR 500. The trains are being pulled as 15 years is considered the life time of Shinkansen equipment.
Note how the train is elevated, etc, in Tokyo.
http://www.youtube.com/watch?v=0aP0t...ttTk9g&index=2
This is being replace by the more efficient, slightly less attractive E6
http://www.youtube.com/watch?v=qzO3h...Pkht5G2YfL7WX4
Are we proud of our trains?