Advanced Civil Speed Enforcement System

<p>Advanced Civil Speed Enforcement System (ACSES) is a <a href="/facts/Positive_train_control/8cCQMDsA">positive train control</a> <a href="/facts/Cab_signalling/KHhlJLe3">cab signaling</a> system developed by <a href="/facts/Alstom/zBnQu3kz">Alstom</a>. The system is designed to prevent <a href="/facts/Train/0mkFQDg9">train</a>-to-train <a href="/facts/Train_wreck/Ea3vDGWE">collisions</a>, protect against overspeed, and protect <a href="/facts/Maintenance_of_way/erncmXfX">work crews</a> with temporary speed restrictions. The information about permanent and temporary <a href="/facts/Slow_zone/kWDhIdnP">speed restrictions</a> is transmitted to the train by <a href="/facts/Transponder/cmqcWPwE">transponders</a> (<a href="/facts/Balises/y7whlhf5">Balises</a>) lying in the <a href="/facts/Railway_track/erncmXfX">track</a>, coded <a href="/facts/Track_circuit/Txl75Un6">track circuits</a> and <a href="/facts/Digital_radio/X0Kp5l8E">digital radio</a>. It was installed beginning in 2000 on all of <a href="/facts/Amtrak/cHtG5Ub3">Amtrak</a>'s <a href="/facts/Northeast_Corridor/9XXxRFh2">Northeast Corridor</a> (except MTA territory) between <a href="/facts/Washington%2c_D.C./enXPK156">Washington</a> and <a href="/facts/Boston%2c_Massachusetts/exjfn6xf">Boston</a>, and has been fully active since December 2015, a few months after the <a href="/facts/2015_Philadelphia_train_derailment/jh1GpvKK">2015 Philadelphia train derailment</a> which it would have prevented.
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Advanced Civil Speed Enforcement System open-in-new

Advanced Civil Speed Enforcement System