LDR Sensor works on Shadow Detection Method. The detection of vehicle using LDR sensor results from the
change in the value of luminous intensity. There are different sources of luminous intensity. In our case, Sun is
considered as the primary source of the luminous intensity. The experiments are conducted by deploying Crossbows
IRIS motes28. Crossbows MDA100CA sensor unit has an embedded LDR sensor. The IRIS mote is implanted in the
surface in a single parking slot to detect the vehicle. The sensor is deployed at the center of the ground of parking slot
in a manner that the sensors aperture is fully exposed with 90 degree upwards from its surface as shown in the Fig. 1.