What does driving dual vehicles mean?

[MacSadie]

Driving dual vehicles refers to traffic restrictions where odd-numbered vehicles are allowed on odd-numbered days and even-numbered vehicles on even-numbered days. Odd-even traffic restrictions: The odd-even traffic restriction system is a traffic management measure introduced to alleviate urban traffic congestion. During the 2007 Beijing Olympic test events, Beijing first implemented the odd-even traffic restriction policy. On odd-numbered dates, only private vehicles with license plates ending in an odd number are permitted on the road, while on even-numbered dates, only those ending in an even number are allowed. Last-digit traffic restrictions: The last-digit traffic restriction system is another measure developed to ease urban traffic pressure, which has proven effective in reducing traffic congestion after implementation. During the 2008 Beijing Olympic test events, Beijing adopted the odd-even traffic restriction policy. On odd-numbered dates, only private vehicles with license plates ending in an odd number can be driven, and on even-numbered dates, only those ending in an even number are permitted.