1.0WAMUhttps://wamu.orgadminhttps://wamu.org/author/admin/rich600338<blockquote class="wp-embedded-content" data-secret="TMPRhmKdru"><a href="https://wamu.org/story/15/05/14/positive_train_control_the_tech_that_couldve_prevented_amtrak_derailment/">Positive Train Control: The Tech That Could’ve Prevented Amtrak Derailment</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://wamu.org/story/15/05/14/positive_train_control_the_tech_that_couldve_prevented_amtrak_derailment/embed/#?secret=TMPRhmKdru" width="600" height="338" title="“Positive Train Control: The Tech That Could’ve Prevented Amtrak Derailment” — WAMU" data-secret="TMPRhmKdru" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript"> /*! This file is auto-generated */ !function(c,d){"use strict";var e=!1,o=!1;if(d.querySelector)if(c.addEventListener)e=!0;if(c.wp=c.wp||{},c.wp.receiveEmbedMessage);else if(c.wp.receiveEmbedMessage=function(e){var t=e.data;if(!t);else if(!(t.secret||t.message||t.value));else if(/[^a-zA-Z0-9]/.test(t.secret));else{for(var r,s,a,i=d.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),n=d.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),o=new RegExp("^https?:$","i"),l=0;l<n.length;l++)n[l].style.display="none";for(l=0;l<i.length;l++)if(r=i[l],e.source!==r.contentWindow);else{if(r.removeAttribute("style"),"height"===t.message){if(1e3<(s=parseInt(t.value,10)))s=1e3;else if(~~s<200)s=200;r.height=s}if("link"===t.message)if(s=d.createElement("a"),a=d.createElement("a"),s.href=r.getAttribute("src"),a.href=t.value,!o.test(a.protocol));else if(a.host===s.host)if(d.activeElement===r)c.top.location.href=t.value}}},e)c.addEventListener("message",c.wp.receiveEmbedMessage,!1),d.addEventListener("DOMContentLoaded",t,!1),c.addEventListener("load",t,!1);function t(){if(o);else{o=!0;for(var e,t,r,s=-1!==navigator.appVersion.indexOf("MSIE 10"),a=!!navigator.userAgent.match(/Trident.*rv:11\./),i=d.querySelectorAll("iframe.wp-embedded-content"),n=0;n<i.length;n++){if(!(r=(t=i[n]).getAttribute("data-secret")))r=Math.random().toString(36).substr(2,10),t.src+="#?secret="+r,t.setAttribute("data-secret",r);if(s||a)(e=t.cloneNode(!0)).removeAttribute("security"),t.parentNode.replaceChild(e,t);t.contentWindow.postMessage({message:"ready",secret:r},"*")}}}}(window,document); </script> https://wamu.org/wp-content/uploads/2015/05/14/ap162079002853_wide-c71809e515c8b6d3ac49383c225d34845d71e1aa-1024x576.jpg1024576The Amtrak passenger train was going more than 100 miles an hour when it derailed north of Philadelphia. Positive train control could have automatically slowed the train down on that stretch of rail.