A law barring Indiana drivers from texting while driving has generated more frustration than tickets in its first three years. The 2011 law bans drivers from using a phone or electronic device to send or read a text message or email while behind the wheel. But police say its difficult to enforce because the law does not prevent drivers from using cellphones to make calls, type in phone numbers or access other applications. It also doesn't permit officers to confiscate a phone to confirm that the driver was texting or emailing with the device. Fewer than 400 motorists were ticketed for illegal texting in the first two years of the law, which can result in a ticket up to $500.