I am trying to program two similiar intersections on an arterial and can not get it quite right.

Each signal operates like this
Phase 1 and 5 (Main street LT, protected only) come up together

Phase 1 off. Phase 2(straight) on with phase 5 (LT)

Phase 2 & 5 off. Phase 6(straight) on with phase 1 (LT)

Phase 5 off. Phase 2 with phase 6 (both straight) on.

Phase 2&6 off. Side street phase 4 & 8 on

Megan, This is a strange phasing pattern. But it can be done using sequential phasing. Go to the "Ring and Barrier Designer..." and select a sequential phasing with 5 phases (one for each line of phase combination you mentioned below).

Then, in the Timing Settings window, use the following numbers in the "Protected Phases" row:

EBL 1 3
EBT 3 4
WBL 1 2
WBT 2 4
NBT 5
SBT 5

In the Permitted Phases row, type in the following numbers
NBL 5
SBL 5

I did a sample intersection with made up numbers and above phasing pattern and it worked just fine - I wanted to attach a screen capture of it here but I don't think I can. If you want it, send me your email address to me via private message and I can email it to you.

Thanks.

quote:

Originally posted by Megan Wilson:
I am trying to program two similiar intersections on an arterial and can not get it quite right.

Each signal operates like this
Phase 1 and 5 (Main street LT, protected only) come up together

Phase 1 off. Phase 2(straight) on with phase 5 (LT)

Phase 2 & 5 off. Phase 6(straight) on with phase 1 (LT)

Phase 5 off. Phase 2 with phase 6 (both straight) on.

Phase 2&6 off. Side street phase 4 & 8 on

very interesting signal sequence. sounds like it attempts to account for limited storage on the phase 1 left turn. Can you tell us where this intersection is so we can check it out on google maps?