That's about 75 miles per hour. Acela (our high-speed intercity train) makes the 39 mile Washington to Baltimore trip (with a single stop in-between) at 68 miles per hour. The non-express intercity train makes a two-stop trip at 49 miles per hour. The commuter train is under 40 miles per hour.
Acela does the trip between Boston and Providence (43.6 miles by rail) in 33 minutes: that's just about 80mph, which includes one stop along the way. The Northeast Regional does it in 38 minutes- about 69mph on average.
The Acela hits 150mph along some stretches in New England.
> Acela (our high-speed intercity train) makes the 39 mile Washington to Baltimore trip (with a single stop in-between) at 68 miles per hour.
That's not necessarily a fair comparison, as IIRC Amtrack shares rail tracks with cargo trains. Cargo trains are far slower and occupy tracks for longer stretches of time, while passenger trains require longer stretches of track to be reserved for their passage to ensure higher circulation speeds. Thus, having to share tracks with slower trains limits how the track can be allocated to passenger traffic.
To put it differently, that would be like stating that a bus is slow because in some stretches of road it is forced to wait cargo trucks to pass.
As a comparison, the TGV connection between Paris and Brussels may be a high-speed track, but train speeds grind to a halt way down to 20km/h when passing through track sections used by commuter and freight trains.
