I've been looking for a Houston tunnels app.

That would be a very useful app! I love hyper local app ideas.

Lots of people have asked me for a good Houston tunnel app as I seem to be the 'tech guy' amongst our circle.

iOS or Android? I could help publicise this app and help beta test if you like? I'm iOS only but have access to borrow an android phone if need be.

How are you handling movement and position checking with no GPS ping? Wifi location?