Question: What is the fastest speed attained by Amtrak's one of the two services (the other being "Northeast Regional") that serve Westbrook?
Sentence (from "Acela Express"): The Acela Express ( ; colloquially abbreviated to Acela) is Amtrak's flagship service along the Northeast Corridor (NEC) in the Northeast United States between Washington, D.C. and Boston via 14 intermediate stops including Baltimore, Philadelphia, and New York City.
Relevant evidence: No