How Traffic Pre-emption Works at a Crossing
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- Опубликовано: 14 окт 2024
- Traffic pre-emption is the system that, on the approach of a train, clears the crossing, keeps traffic from entering the crossing and keeps the rest of the traffic moving. While it may sound complicated, it is really a pretty simple system from the railroad end. A little more for the municipalities who program how the traffic signals will work.
Here is how it works!
Olive Drive Crossing GPS 35 24' 49"N 119 03' 09"W
MCM helping to stamp out railroad ignorance, one video at a time. Thanks.
I know I like being informed on subjects with which I am unfamiliar so it makes sense for me to share my knowledge and experience, especially if it will help keep folks safe!
Thanks for checking it out!
Thanks Mark! It’s safe to say a lot of folks never knew Pre-emption existed around traffic signals.
Happy Thanksgiving . Thank for showing that . About the crossing and the street lights . When a Train coming down the tracks . All the best love your work . All the best 😄
Good morning to all from SE Louisiana 19 Nov 21.
Very cool! It takes a lot of specific knowledge of the intersection and traffic patterns to program the controllers. I don't think they have a circuit for cooling off drivers waiting for a long train yet :) Folks seem to have short fuses at RR crossings these days.
HA! They've ALWAYS had short fuses! I've been in fights where I wasn't so verbally abused as I have been working at crossings!
Thanks for checking it out!
Very Interesting subject and like always, you’re Overqualified to Answer Railroad Questions. Thx!👍
I built traffic control cabinets. I should say I wired and tested the cabinets. You have most of the time 3 Pre-emptions, High based fire, low base bus and transit trains, and RR Pre-empt. The last cabinets I wire we had 2 types of RR pre-empt, hard wire 120 volts and digital with a micro processor board in a card rack.
Very nice video Mark.
Thank you. great videos. Have a great Thanksgiving.
THankyou for the time to explain that.. I read part of the FRA/NTSB report on the unfortunate fatal BUS vs. Metra Train accident In the Chicago area (Fox River Creek)... same situation but the city was at fault for continuing to extend the Pedestrian xing signal which locked out the signal from turning green to clear the traffic and thus the bus couldn't move and 7 kids perished in that one... its serious stuff!! That was about 25 yrs ago... Sorry sad but I wanted share to let others know how bad it can be...
Thanks for the info Mark. Your work experience and knowledge of railroad operations is what makes your videos so credible and a pleasure to watch.
Thank you! I am so glad you enjoy them and thanks for checking it out!
Interesting! Thanks, Mark.
Very interesting. Thanks!
A tourist railroad I work on has a poorly designed crossing. Our track bisects right in the middle of a major highway intersection. Both roads are 4-6 lanes wide. The traffic lights are tied to our crossing circuit. When we activate the crossing lights, all the cross traffic lights go red. Unfortunately the highway dept didnt want to get gates there. We have people make "right-turns-on-red" in front of us as we're moving through the crossing. There are signs at those spots that say "no turn on red" but we hit so many cars (we're only going 10mph) because people arent paying any attention.
I have several videos on my channel shoving through on the caboose. St Louis Iron Mountain & Southern.
I subscribed. I'll check it out!
If only you could toss a road flare out ahead of you lol. You would think the highway department would do something for y'all. Yikes...
Thanks for the info Mark. You do a great job of explaining how things work.
Definitely informative
Awesome Mark 👍👏👏👏👏
Great video Mark, very informative like the way speak about it too, basically right to point.
I really try and not over explain things. You all seem to grasp this stuff without me being too verbose! K.I.S.S.!
Thanks for checking it out!
You sound and look a lot better
UP has an external traffic signal pre-emp connection outside the instrument house. The NEMA traffic signal controllers have a clearance phase before it goes into flash or omits the phase from the trackside.
Advanced preemption. We have in this area for the bigger crossings at more acute angles but I wanted to keep it simple
Awesome! NS & CSX has those advanced pre-emp here as well with their GCP-5000's. Most of those projects were Federally funded.
Interesting video
I have a question regarding the grade crossing
What triggers the gates to go up as soon as the train passes without interfering with the approach from the other side of the crossing
The rr crossing has an island circuit that extends the width of the roadway plus 50' on either side. Once that circuit is cleared, the crossing recovers and the gates pick up. If you go to my playlist "How the Signal Department Works" I have a video about how crossings work. Thanks for checking it out!
Thanks for the reply
Enjoy your videos
On My Territory the light turns green first before the crossing fully activated for anyone is still on the tracks
Hey , you might find the latest 'locker nuts ' vids of interest ,fella bought a locker for a buck !
is the bell electromechanical or did they do away with those?
They're still around but are always replaced with electronic type when they wear out or are involved in a knockdown
@@MarkClayMcGowan Thanks! Really enjoy your channel