Over the past 10 years we have collected transponders from several states. When we hit the road, we thought we should need to pick up a Sun Pass from Florida and the Express Toll, EZ Tag and IPass would take care of the rest. This week, while driving toll roads in Texas, we had a moment of clarity and found out that the Sunpass wasn't going to work on the TXTag roads and it was possible that neither would our Colorado Express Toll, or our Houston EZ Tag! Because of all of this, we did some research and are presenting you with out findings, or what we couldn't find. As it turns out, most of these toll authorities are very vague on where their passes work and even present states where it will work without giving you the fine detail that it will only work on some roads. We will update the video using shorts as we get additional information, but I hope our frustration is shared or is easily relieved with some source on what toll transponders work and where.