Just started working for a company in NC and your videos have helped me understand the phasing ALOT! When it was first explained to me I felt like it was a forgiven language
If you're on the lagging side and want to go straight, that means if the green left turn arrow comes on, it's your last chance to make it through the circular green light. If you're way too far back from it and the green arrow comes on, that means the whole light may turn yellow on you about time you reach it. If the lagging side circular light is green and the arrow is red or flashing yellow, that means you can most likely make it through while you're a bit far back from it. If you're on the leading side and want to go straight, that means if the left turn arrow turns yellow while the circular light is still green, it's your last chance to make it through the circular green light. If you're way too far back from it and the left turn arrow turns yellow, that means the circular light may turn yellow on you about time you reach it. If the circular and arrow light is green at the same time, that means you can most likely make it through while you're a bit far back from it since the arrow turns yellow first before the circular light turns yellow.
Hello from Connecticut! Here in Conn, a new practice is at locations the side streets cross the main street of 3 or more lanes, is to split the side streets so that Phases 3 & 8 are green together, terminate and then Phases 4 & 7 run together. This is called split side street phasing and has been used sucessfuly at hundreds of intersections. If you are wondering about extended cycle time the green time, the green time is half of what the straight through phase 4 & 8 side street green operation normally would of been.
I’ve seen this type of phasing where I’m from as well. However, I’ve also seen it where there’s the lead/lag configuration, but the side that had the leading arrow also has a sign by each 5-section saying “oncoming traffic has extended green” that illuminates and stays lit until the opposing signal turns yellow.
This is definitely not to be confused with split phase configuration. A split phase means that only corresponding phases run together on the side street like this. This comes in handy with roads that don't have dedicated left turn lanes and the municipality wants to reduce the potential for a "failure to yield on left turn" collision.
@train1596-fairly simple You’ll need to go into Alt Sequence menu. Then find which phases you want switched. Once you know which Alt Sequence # you want to use-go back to main menu. From there, select Unit Data, then Start Up. At the bottom you should see alt sequence selection. Input that number in there and test it out. Hope that makes sense!
I'm not exactly sure what the question is that you are asking. Are you saying you want the through phases to cycle first and then the left turn phases?
You would essentially lag both the left turn phases, or if you look at it via sequence, you would have the throughs run first in the ring diagram before the lefts. (Ring 1: 2 1 | 4 3) (Ring 2: 6 5 | 8 7)
You can set different sequences and then program those sequences to run using time of day plans in most controllers. There are some different ways of doing this depending on which controller you're using but for the most part, the sequence is how the ring is represented... Some older controllers even have really awesome sequence presets, the traconnex TMP390 had preconfigured sequences that you could pretty much just program into a day plan. Even some newer controllers don't have that feature.
Hello, your content has been so helpful, I would like to have a private conversation as regards to traffic control system. i await your response. Thanks.
your explanation makes it so easy to understand. many thanks!
Just started working for a company in NC and your videos have helped me understand the phasing ALOT! When it was first explained to me I felt like it was a forgiven language
So glad that it was helpful for you!
If you're on the lagging side and want to go straight, that means if the green left turn arrow comes on, it's your last chance to make it through the circular green light. If you're way too far back from it and the green arrow comes on, that means the whole light may turn yellow on you about time you reach it. If the lagging side circular light is green and the arrow is red or flashing yellow, that means you can most likely make it through while you're a bit far back from it. If you're on the leading side and want to go straight, that means if the left turn arrow turns yellow while the circular light is still green, it's your last chance to make it through the circular green light. If you're way too far back from it and the left turn arrow turns yellow, that means the circular light may turn yellow on you about time you reach it. If the circular and arrow light is green at the same time, that means you can most likely make it through while you're a bit far back from it since the arrow turns yellow first before the circular light turns yellow.
Exactly what I asked for!!! Thanks a ton!
I'm glad it answered your questions (hopefully).
In Pittsburgh we have started to have lag left turns so the pedestrian can walk first
Hello from Connecticut! Here in Conn, a new practice is at locations the side streets cross the main street of 3 or more lanes, is to split the side streets so that Phases 3 & 8 are green together, terminate and then Phases 4 & 7 run together. This is called split side street phasing and has been used sucessfuly at hundreds of intersections. If you are wondering about extended cycle time the green time, the green time is half of what the straight through phase 4 & 8 side street green operation normally would of been.
Much safer because left turning cars don't have a chance to collide with oncoming traffic or miss crossing pedestrians to their left
I’ve seen this type of phasing where I’m from as well. However, I’ve also seen it where there’s the lead/lag configuration, but the side that had the leading arrow also has a sign by each 5-section saying “oncoming traffic has extended green” that illuminates and stays lit until the opposing signal turns yellow.
Thank you, finally understand the Lead-lag configuration!.😄
Great video. Please keep them coming.
Ah, so that's what that sequence is. I always see it but never knew what it was called.
This is definitely not to be confused with split phase configuration. A split phase means that only corresponding phases run together on the side street like this. This comes in handy with roads that don't have dedicated left turn lanes and the municipality wants to reduce the potential for a "failure to yield on left turn" collision.
@@trafficsignalstraining7673 yea I definitely know split phasing doesn't supposed to be on a main street.
How do you program the lead-lag on a Siemens M50?
@train1596-fairly simple
You’ll need to go into Alt Sequence menu.
Then find which phases you want switched. Once you know which Alt Sequence # you want to use-go back to main menu.
From there, select Unit Data, then Start Up. At the bottom you should see alt sequence selection. Input that number in there and test it out. Hope that makes sense!
How about the side st
Can you please do a video on how to program A MMU.
Which MMU are you referring to? Newer EDI MMU2’s are slightly different than the older MMU’s
working on traffic signals is my dream job.
Awesome! To be honest I never imagined myself doing this before I got into it but it's my dream job too!
How do I make the straights and then the left turns?
I'm not exactly sure what the question is that you are asking. Are you saying you want the through phases to cycle first and then the left turn phases?
@@trafficsignalstraining7673 Yes
You would essentially lag both the left turn phases, or if you look at it via sequence, you would have the throughs run first in the ring diagram before the lefts. (Ring 1: 2 1 | 4 3) (Ring 2: 6 5 | 8 7)
@@Cm214__ I understand.
can you explain lead and lag in brief more than this video
How do you achieve this? Do you change the ring structure?
You can set different sequences and then program those sequences to run using time of day plans in most controllers. There are some different ways of doing this depending on which controller you're using but for the most part, the sequence is how the ring is represented... Some older controllers even have really awesome sequence presets, the traconnex TMP390 had preconfigured sequences that you could pretty much just program into a day plan. Even some newer controllers don't have that feature.
Wow 👏 thank you 8
Hello, your content has been so helpful, I would like to have a private conversation as regards to traffic control system. i await your response. Thanks.