HOUSTON – If you travel frequently on toll roads managed by the Texas Department of Transportation, you could be in for a big surprise over the next few days and weeks. A Texas Tag system upgrade could cause major problems for your budget if you’re not prepared. Delayed Billing and ChargesThe Texas Department of Transportation started transitioning to a new operating system on November 18th. The system was still down on Jan. 11, meaning not a single toll had been deducted from any accounts in two months. Some users worried they would get hit with huge toll bills all at once.