It’s a very innovative project.all the best…
U should use PIR sensor instead of ldr sensor.U can also use this sensor in realtime application.it gives wider range than ldr.
how we applicable ? i think PIR is best than LDR … we should prepare routine first how will work sensor … according road safety with the speed limit (min-15 km/hr to 200 km/hr ) the vehicle !
Here LDR is only used to detect intensity of light in surrounding environment … (i.e. day or night) so, that Streetlight can automatically switch off during day time .
infrared also abe to work with all environment and all weather !