The new Siemens Charger locomotives are being phased in to many routes out of Chicago and the Missouri River Runner (Texas Eagle, California Zephyr, and Southwest Chief are not included so I'm guessing they're not yet suited for BiLevel cars or long distance routes). According to a Chicago Tribune article, the greatest impact will be seen on the Lincoln Service but all routes will see improved service.
The new Siemens Charger Locomotives:
4,400 horsepower, up from the old GE 4,250 hp locomotives.
Speed limits of 110 mph but capable of 125 mph
90% reduction in emissions (!!!!)
16% reduction in fuel consumption
Dynamic braking with energy recovery
Better acceleration, better braking, and greater overall reliability.
Grand finale: They're aiming for
4.5 Hours from St. Louis to Chicago by January. Down one hour from today.
This is almost entirely due to more 110 mph legs between Alton and Joliet, getting into Chicago around the freight trains is still the trickiest part. Another factor is (and feel free to correct me if I'm wrong here) Positive Train Control which allows trains to know where other trains are, run closer together, and organize themselves better on crowded tracks around Chicago.
Currently, I believe the MO River Runner tops out at 80 mph, an increase to 110 mph would require bridge and crossing improvements funded by the Missouri Legislature.
http://www.chicagotribune.com/news/loca ... story.html
http://siemensusa.synapticdigital.com/F ... 35c7fec16d
https://en.wikipedia.org/wiki/Siemens_Charger
Screen Shot 2017-08-30 at 1.06.42 PM by
Alex Price, on Flickr
Screen Shot 2017-08-30 at 1.07.08 PM by
Alex Price, on Flickr