Why doesn't etc send consumer SMS in real time?

Although ETC technology can realize real-time fee deduction at present, it cannot realize the function of sending consumer short messages in real time. This is a complicated data transmission and exchange process: after deducting money in the driveway, the deduction information must be transmitted to the bank where you handle ETC, and the bank will return the information to you; If your vehicle passes through other provinces, you must also send the data from other provinces to the road network center of the Ministry of Communications, and then send the data back to the province, which in turn sends it back to the bank, which in turn sends it back to your mobile phone. The data transmission spans thousands of waters in Qian Shan, so it is impossible to transmit the deduction information to you in real time, so please understand how many engineers have gone through complicated processing in order to give you a correct consumption information.