The scheme covers the area bounded by the Inner Ring Road in central London (22 sq km), and operates on weekdays (bar public holidays) from 7.00 am to 6.30 pm. Drivers who enter the zone have until 10 pm on the day of travel to pay the £5 charge. Failure to pay the charge results in an £80 fine. The scheme is enforced using cameras in and around the charging zone. In the first year of the scheme's implementation, traffic delays in central London dropped by around 30% and around 65,000-70,000 fewer car movements come into the zone each day.