Adaptive traffic flow control system for controlled intersections

Abstract

The utility model relates to the field of automated traffic control and can be used for adaptive traffic light control in urban transport network conditions. The system comprises: vehicle detection units (1) based on a three-axis magnetometer with an autonomous power supply, placed in the road surface; pedestrian crowd detection units (2) based on a 24 GHz FMCW radar; on-board beacons (3) on public and emergency service vehicles; repeaters (4) on urban infrastructure supports; intersection control units (5); interface adapters (6) with galvanic isolation and support for the TSCU, OCIT, UTMC, NTCIP 1202 protocols; mesh network coordinating node (7); IEEE 802.15.4 / ZigBee PRO self-organizing mesh network (8). All nodes (2)-(5) and (7) are built on a single hardware architecture ESP32-C6 and ZigBee coprocessor CC2652P or EFR32MG24. The intersection control unit implements a modified Max-Pressure algorithm with an expanded pressure function that takes into account accumulated vehicle waiting time, pedestrian pressure, and emergency response priority. It supports five operating modes: initialization, normal, priority, recovery, and fixed. An interface adapter enables connection to existing traffic controllers without replacing the installed hardware. The technical result is a reduction in the average waiting time for vehicles by 19-27%, autonomous operation of each intersection in the event of a communication failure, the formation of a dynamic green corridor for special vehicles, AES-128 hardware encryption, and a reduction in installation labor intensity due to the elimination of cable infrastructure.