Today is the official start of the Independence Day holiday travel rush and the forecast: hot and crowded. ABC News reports AAA forecasts a surge on the roads, 34 million people driving this Independence day weekend, just as highway crews hit the busy summer repair season and the Highway Trust Fund that pays for it starts running on empty. Turns out, there's an app for that. The US Travel Association has one called "I'mStuck." Enter your zip code and a quick snapshot of the gridlock, and the app automatically sends it --- to your Congressman.