Colorado's Department of Transportation has a new iPhone app to help you avoid driving under the influence.
It's a free program that helps users determine their estimated blood-alcohol content, based on typical info: gender, weight, how much you've had and how long you've been drinking.
The app will then tell you whether you should be driving, in messages such as "Don't even think about it." Of course, if you aren't sober enough to remember how many beers and shots you've pounded, the results might not be correct.
There's another aspect of the app that could be useful: a "Taxi" icon that determines where you are (from the iPhone's GPS) and provides a phone number for a nearby cab.
The program, which has been downloaded more than 3,000 times in two weeks from Apple's app site, is
easy to find. Just go to http://www.coloradodot.info/programs/plan-ahead and click on the "Available on the App Store" icon on the left side of the page.
Tip: It wouldn't hurt to calculate your limit in advance, when you're sober, or just before anyone starts ordering tequila.