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<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT face=verdana,geneva>Al, Tyler, and RWM, </FONT></P><FONT face=verdana,geneva> <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></FONT> <P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT face=verdana,geneva>Thanks for your input on maximum speeds over grade crossings.</FONT></P><FONT face=verdana,geneva> <o:p></o:p></FONT> <P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT face=verdana,geneva>John, </FONT></P><FONT face=verdana,geneva> <o:p></o:p></FONT> <P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT face=verdana,geneva>Regarding your point about the signal triggering problems with RDCs, I have heard of this.<SPAN style="mso-spacerun: yes">  </SPAN>Not only were the problems due to relatively lightweight of RDCs, but also due to the fact that they have disc brakes.<SPAN style="mso-spacerun: yes">  </SPAN>Without brakes acting upon the wheel treads, a buildup of dirt and oil would develop. The self-cleaning nature of the wheel running on the rails was not sufficient to prevent this buildup.<SPAN style="mso-spacerun: yes">  </SPAN></FONT></P> <P class=MsoNormal style="MARGIN: 0in 0in 0pt"><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><FONT face=verdana,geneva size=2></FONT></SPAN> </P> <P class=MsoNormal style="MARGIN: 0in 0in 0pt"><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><FONT face=verdana,geneva size=2>The article linked above, refers to signal triggering inadequacy that seems to be associated with Amtrak locomotives, and specifically related to the braking systems on those locomotives, which is said to be different than on other locomotives.<SPAN style="mso-spacerun: yes">  </SPAN>But they stop there and don’t describe the difference in braking systems.<SPAN style="mso-spacerun: yes">  </SPAN>Do some Amtrak locomotives have disc brakes?</FONT></SPAN></P>
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