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U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation

Automatic Train Control (ATC) and Advanced Civil Speed Enforcement System (ACSES); Northeast Corridor (NEC) Railroads

Amendment to Order of Particular Applicability requiring ACSES between New Haven, Connecticut, and Boston, Massachusetts--modification of temporary speed restriction requirements.

In 1998, FRA issued an Order of Particular Applicability (Order) requiring all trains operating on the Northeast Corridor (NEC) between New Haven, Connecticut, and Boston, Massachusetts (NEC-North End) to be equipped to respond to the new Advanced Civil Speed Enforcement System (ACSES). In August of 2001, the National Railroad Passenger Corporation (Amtrak) requested that FRA temporarily suspend the Order's requirement to enforce temporary speed restrictions (TSRs) through the use of temporary transponders on the NEC-North End between Mill River Interlocking at mile post (MP) 73.6 and High Street Interlocking at MP 142.9. After reviewing data that Amtrak provided in August 2003 on its current transponder attrition rate, FRA has decided to grant the requested relief until April 1, 2005.

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