We are working on a one-way arterial, 1.5 mile section, with 8 signals. We've developed the splits we want. When we use the optimize offsets option, we get a green band of 16 seconds. By manually adjusting the offsets on the time-space diagram, we can increase our green band to 37 seconds. What is the program considering in it's optimization routine that is giving such a reduced band width?
Thanks for your help.

Hi RCTraffic,

Synchro's objective function is to minimize a PI. This value is based on stops and delays, not bandwidth. When looking at bandwidth, be sure to also look at the flows to ensure you don't have turns from the side street that are causing delay. Even if you have a wide band, this may be meaningless if the side streets are dumping large amounts of volume into the network.

Save the file as determined by Synchro. Also, save the file you modify by hand. Compare the network stops and delays in both. Synchro is attempting to minimize these values.

If bandwidth is truly the desired result, then modifying by hand is a very valid choice.

Thanks,

John.