Glad to be of help.
The underpass, which is the same tunnel that the new train/metro takes avoids any possible hold ups at the traffic lights. You end up on the same road so it's nor important.
If you ever go back to Antalya and wanted to go into the city and really don't fancy the mayhem of Antalya traffic.
You could park near to Ozdilek and Kipa and take the train/tram ( there is a stop close-by) into the city. It's not expensive,1.5 lira if my memory serves , there is a route map on display inside the cariage and a nice lady (on the tannoy system lets you know where you are.