It's official: Mayor Mufi Hannemann this morning signed a bill that limits the use of portable electronic devices while driving.

Aimed primarily at cell phones, the ban includes digital cameras, video games, personal digital assistants and laptop computers.

Violators will be subject to fines of $15 to $100, as determined by the state District Court.

The bill becomes law on July 1.

"This historic and comprehensive legislation was carefully crafted to help improve public safety on our streets and highways," Hannemann said in a statement. "Our intent is to ensure drivers keep their attention focused on the road, where it belongs. We all must be more careful and more considerate of other drivers and of pedestrians, especially the elderly, children and the disabled."

The City Council approved the measure April 24 by a vote of 6 to 1, with one absence and one vacancy.