NortheastDirect Top Speed
As somebody who didn't ride Amtrak a lot before 2000 and certainly wasn't measuring train speed then, I've always wondered what the top speed was for AEM-7 + Amfleet sets on Regional trains when the Metroliners were running. At the time, 125 mph seemed to be marketed exclusively for the Metroliners, even though there was no equipment limitation preventing other trains from reaching this speed.
Assuming an AEM-7 was leading and all Amfleets (I know some locos were slower), did they lower the speed of non-Metroliner trains and just increase it to 125 once the Acela launched? Or was 125 the norm before? And how did the schedule handle this in case there was a change in equipment?