You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "What is the fastest speed attained by Amtrak's one of the two services (the other being "Northeast Regional") that serve Westbrook?" whose answer is 150 mph.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Speed of Downeaster Amtrak service
Useful Output:

Doc 1: The drop in ridership demonstrates the importance of boosting the speed from 60 mph to 79 mph, said Amtrak spokesman Dan Stessel. The rail
Doc 2: It averages 44 mph on the route and has a top speed of 79 mph. Most of the time the train will be going below the top speed of 79 mph. Is The
Doc 3: The Acela Express is the fastest train in the Western Hemi- sphere, with a maximum speed of 150 mph (241 kph) over current infrastructure on two sections of its
Doc 4: Although the corridor could be further upgraded to support passenger train speeds as high as 90 mph where the alignment permits, operation at such speed within
Doc 5: The Downeaster is a 145-mile passenger train service operated by Amtrak and managed by the Northern New England Passenger Rail Authority, an