The invention discloses an ETC door frame operation state 
monitoring system for an expressway, and the 
system employs an advanced 
information processing mechanism to complete the real-
time processing of 
big data, achieves the monitoring of all equipment, achieves the evaluation of road network operation indexes, carries out the real-time notification and prompt of resource alarm information, and achieves the multi-layer and multi-point comprehensive combined application. The 
system comprises a 
system operation and maintenance 
cockpit, a monitoring center, a report center, an equipment management sub-module, an operation and 
maintenance management sub-module, a system management sub-module and the like. Core functions of the monitoring center comprise 
software version check, 
heartbeat state statistics, 
heartbeat real-time state statistics, 
transmission delay statistics and system alarm information. Core functions of the report center comprise a whole province 
toll station transaction amount statistical table, expressway exit 
station traffic flow statistics, expressway 
truck 10% discount amount statistics, expressway exit 
traffic flow statistics, bottom-
toll rate transaction amount, transaction amount statistics and the like. All kinds of data used by the system are obtained according to a standard 
interface protocol and a 
network management protocol.