VOP when route planning

[dnr]

I just travelled down south to Surfside Beach, SC, and when planning my route to get there, it asked me if I wanted to avoid VOP. I said yes...kept me on the main expressway all the way down. When planning route to come back home up north to Canada, it asked if I wanted to avoid VOP and I said no. This led me on all the toll roads and the turnpike in PA which was long and boring. What does VOP actually mean when route planning. Thanks.

 

[dhn]

I'm aware of HOV (High Occupancy Vehicle lanes), Toll Roads, and Ferries. But VOP? I don't know that one.