I don't know the exact answer to those questions. The new "Commuter Corridor Analysis" that URS Corporation is beginning for ACOG will most likely answers those and many other technical questions about conerning commuter rail, including estimated ridershsip, service frequency, operational capacities, station locations, track and infrastructure improvements, train types and numbers, and development and operational costs. The study will be ongoing for the next year and a half or so. URS will hold a number of public meetings during that time to obtain public input and discuss their efforts. I encourage everyone to keep informed throughout the process and participate in the public scoping process.
There were some preliminary estimates made of commuter rail service frequency and operational capacities by Jacobs Engineering as part of the Intermodal Hub Study that was completed in 2011. Those estimates were used to analyze service and operational capacity of the proposed intermodal hub. You can find information on the hub study at ACOG's website:
ACOG Intermodal Hub Study
Based on the Jacobs analysis, there would be seperate trains that ran between a) Norman and Edmond, b) Norman and Midwest City and c) Edmond and Midwest City. All trains would connect through Santa Fe Intermodal Station in OKC. The Norman to Emdond trains would be on offsetting service times from the Norman to Midwest City and Edmond to Midwest City trains. With the offset service times, if the trains were initially all on one-hour headways, the effect would be 30-minute headways for the system. The number of train sets required to operate on 30-minute headways will depend on the number of stations, stop times and other factors. My guess would be that initially each train set would be made up of one locomotive and two or three bi-level coaches. As ridership grows, you don't add additional train sets, just additonal coaches. You would only need to add additional train sets if you went to shorter headway times.
I hope that helps answer your questions.
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