There exists an interconnection of standard ITS and parking lot management functional modules. Both systems share
the functional modules related to traffic state measurement, measured data processing and archiving, payment system,
and traffic user information. From this interconnection arises the need for integration of both systems. Most significant
importance regarding ITS based integration of parking lots into a wider urban traffic area is related to driver
information and navigation systems. Such driver information systems have two modes: (i) mode related to informing
and navigating drivers searching for a parking lot, and (ii) mode related to informing and navigating in a parking lot to a
free parking space. For both purposes variable message signs presenting number of free parking spaces and distance to
particular parking lot/space are used. These systems are today common in larger cities or larger parking lots.