Thank you very much for This Video. Very useful explanation in a simple manner. I wish I had it during my MSc degree in Transportation and Planning.... I guess you used some screenshots from LinSig !
I can’t believe Amber timing is not to be adjusted. Here in the US we can adjust is and it’s calculated using road speed, and grade or slope, as well as distance across intersection. It is much safer than just 3 seconds no matter what.
Actually, we calculate the inter-green period in a similar fashion, so account for issues such as the distances between conflicting stop lines, but show All-Red if this is more than the 5-second amber periods. Because of this, we don't suffer the same extent of amber gambling you have in the US, because everyone knows at every set of signals what the amber periods will be, giving absolute consistency. Therefore the minimum inter-green period from one phase finishing to another starting is made up of the leaving amber then the starting amber (yes we have two displays with amber in!) so 2+3seconds = 5 seconds, not 3, but critically then if required an All-Red as well. We also have some other safeguards in place on higher speed approaches, to improve safety in the event of a higher speed vehicle approaching when the leaving amber is shown after the green period. Hope that helps, thanks for watching.
This is really helpful course. Thanks for creating it
You are very welcome, tell all your friends to subscribe!
Amazing! Thanks!
Thank you very much for This Video.
Very useful explanation in a simple manner.
I wish I had it during my MSc degree in Transportation and Planning.... I guess you used some screenshots from LinSig !
I can’t believe Amber timing is not to be adjusted. Here in the US we can adjust is and it’s calculated using road speed, and grade or slope, as well as distance across intersection. It is much safer than just 3 seconds no matter what.
Actually, we calculate the inter-green period in a similar fashion, so account for issues such as the distances between conflicting stop lines, but show All-Red if this is more than the 5-second amber periods. Because of this, we don't suffer the same extent of amber gambling you have in the US, because everyone knows at every set of signals what the amber periods will be, giving absolute consistency. Therefore the minimum inter-green period from one phase finishing to another starting is made up of the leaving amber then the starting amber (yes we have two displays with amber in!) so 2+3seconds = 5 seconds, not 3, but critically then if required an All-Red as well. We also have some other safeguards in place on higher speed approaches, to improve safety in the event of a higher speed vehicle approaching when the leaving amber is shown after the green period. Hope that helps, thanks for watching.