Washington ? More people than ever are turning their cars into personal phone booths, with a million and a half drivers gabbing on cell phones at any given time. Women and young people are the most common yakkers.

About 10 percent of the people on the road during the day are using cell phones, up from 8 percent in 2004, the government reported Thursday.

Six percent of drivers were holding the phones to their ears, up from 5 percent last year.

The National Highway Traffic Safety Administration, which issued the report, recommends that motorists use cell phones while driving only during an emergency.

Connecticut, New York, New Jersey and the District of Columbia prohibit talking on hand-held cell phones while driving.

The NHTSA survey was conducted between June 6 and June 25 at 1,200 road sites across the nation. Trained observers watched vehicles go by and charted what the driver was doing. The ages of drivers are estimates based on their observations.

The survey found that 10 percent of drivers between 16 and 24 were holding cell phones to their ears, compared with 8 percent in 2004. Only 1 percent of drivers ages 70 and older were using handheld cell phones.