Go here to download AT&T DriveMode app to curb the urge to text while you drive.
AT&T Customers, download the app for free now:
BlackBerry App World™
Android: Google Play
When enabled, the app sends a customizable auto-reply message to incoming texts*, letting your friends know you're behind the wheel and will reply when it's safe.
* Data and text messaging charges may apply for download and app usage. Standard messaging rates apply to auto-reply messages. AT&T DriveMode is free to AT&T customers only. Compatible device required.