Under what condition can a driver use a handheld device for texting in Iowa?

In Iowa, the use of handheld devices for texting is generally prohibited for all drivers. This law is in place to enhance road safety by reducing distractions that can lead to accidents. Texting while driving involves a significant cognitive and physical distraction, which increases the risk of collisions.

The other choices imply situations where texting might be allowed, but Iowa law does not provide exceptions for texting, even if a driver is stopped at a red light or utilizing hands-free features. The law aims to prevent any form of texting while operating a motor vehicle, thus making the focus solely on driving. Using a handheld device is only considered lawful in specific emergency situations, but this does not extend to general texting. Therefore, recognizing that the law prohibits texting while driving encompasses a significant aspect of Iowa's commitment to roadway safety.