WASHINGTON — Backup cameras could become more common in future vehicles.

The government today is proposing new rules aimed at improving rear visibility standards for cars. The Transportation Department is concerned about children being backed over by unsuspecting drivers.

Most carmakers will meet the requirements by installing rear-mounted video cameras and in-vehicle displays.

The plan is expected to be completed next year and will be phased in during the 2012-2014 model years.

Transportation Secretary Ray LaHood says the changes will help ensure drivers know when it is safe to back up.

The government estimates nearly 300 people are killed and 18,000 injured each year because of backovers. Nearly half the deaths involve children under age 5.