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Limited parking but unlimited cars leaves problems. There always being no parking left, especially in the evening, which results to people parking with no order.
There would be lots of room on the road at night, which people can make full use of to park. Furthermore, you can only park on some road in some specific time period, and people would park with no order because of no parking line. And if parking line painted on the road, it can be very ugly in daytime.
Parking Light can make a temporary parking space with its launching ray on the road at night. Therefore people can park at the roadside in order.
Jingchun Wang Ketuo Zhou Binghao Jiang Junnan Yu