How many days is the highway free during the 2020 National Day holiday?

[OJohn]

2020 National Day holiday highway is free for 8 days, starting from 00:00 on October 1 to 24:00 on October 8. The free highway toll period is based on the time when the vehicle leaves the toll lane at the highway exit. If you enter the highway during the toll period and exit during the free period, you will not be charged; if you enter during the free period and exit during the toll period, you will be charged. A highway is a multi-lane road exclusively designed for vehicles to travel in separate directions and lanes, with full access control. The average annual daily design traffic volume of a highway should be more than 15,000 passenger cars, with a design speed of 80 to 120 kilometers per hour.