SERVER AND VEHICLE CONTROL SYSTEM

The server 100 includes an infrastructure cooperation section determination unit 105 that determines an infrastructure cooperation section indicating a range in which an in-vehicle device 300 performs a cooperative operation with an infrastructure sensor 200 and performs traveling support of the host vehicle, and transmits cooperative operation information for the in-vehicle device 300 to start or stop the cooperative operation with the infrastructure sensor 200 to the in-vehicle device 300 based on the infrastructure cooperation section determined by the infrastructure cooperation section determination unit 105. The in-vehicle device 300 sets or cancels the cooperative operation mode by the mode setting unit 302 based on the cooperative operation information transmitted from the server 100.