Passing a parked taxicab, he spoke a whispered command to the drowsy driver, who immediately wakened from his fake sleep and remained alert.

The study estimates that 16.5 percent of fatal crashes involve a drowsy driver.

Entering a taxi, he told the drowsy driver to take him to the Hotel Bontezan.

The idea is to alert drowsy or inattentive drivers.

Automakers and traffic safety experts have long sought a cure for the drowsy driver, using both low- and high-tech systems.

In a quiet voice, he ordered the drowsy driver to start.

The drowsy driver did not realize that he had obtained a silent, mysterious passenger.

Since the crime prevention group helped assemble these rules, Ms. O'Neil was asked where the drowsy driver should go instead.

When he attended academic seminars, he sometimes wore an alarm device originally intended to jolt drowsy drivers awake.

Research at Loughborough University has shown one in 7 accidents is caused by drowsy drivers.