The premier advantage of IR sensor is the accuracy of the detecting vehicles. Unlike LDR sensor, IR sensor is
less vulnerable to the environmental conditions. Factors such as whether the parking slot is under shelter or without
shelter, location of the parking slot with respect to the angle of arrival of the Sun light (i.e. east, west, north and south),
environmental effects (such cloudy, bad weather), different time intervals, change in luminous intensity of the Sun in
24 hours time and also duration of a day difference in 365 days of a year, has no any impact over the performance of
the IR sensor in comparison to LDR Sensor. These factors greatly influence the performance of LDR sensor. The sole
disadvantage is the IR sensors, is they are not cost effective.