Traffic Status Prediction of Arterial Roads Based on the Deep Recurrent Q-Learning

Table 1

Example of traffic state parameters returned from the Gaode big data platform.

Time frame	Speed (km/h)	Travel time (min)	Delay time (min)	Temperature (°C)	Precipitation	Delay index
2019/5/17 3:23	61	16.2	2.1	18	0.2	1.5

Note. The road delay index is used as an evaluation index for the urban congestion degree, which refers to the ratio of actual travel time to the free-flow travel time for the city residents.