Mean Speed Measurements
The so-called “mean speed” measurements are the most efficient and also cost-efficient means of monitoring speeds at extended road sections outside settlements. Many drivers decelerate when approaching instantaneous speed monitoring areas and accelerate after passing them in violation of the permissible speed limits at such road sections. It is due to low efficiency of instantaneous speed monitoring at highways.
Using speed limit chains is the most efficient solution for ensuring drivers’ compliance with speed limits at highways outside settlements. The solution ensures accurate identification of exceeding speed limits throughout monitored extended road sections by increasing the monitoring area from dozens of meters to several kilometers.
ATOM MS speed limit chains share GLONASS/GPS satellite time synchronization and server processing thus virtually ruling out vehicle speed computation uncertainties and stabilizing the system operation.
Real road profiles with all height gradients, curves, and turns are taken into account when the system is configured.
Features of the ATOM MS system for speed monitoring in extended road sections:
- the most cost efficient system for measuring mean speeds in extended road sections;
- connectivity of road sections with different speed limits;
- GLONASS/GPS synchronization;
- minimum distance between monitoring borders (100 m);
- mean speed measurement from 0 to 350 km/hr;
- permissible absolute uncertainty thresholds for internal clock UTC (SU) synchronization 100 ns;
- low power consumption (25 W);
- standard weatherproof versions;
- embedded wireless communications (Wi-Fi/3G/4G/LTE);
- small dimensions;
- calibration frequency of 2 years.
All measurement systems within speed limit chains may identify other traffic offences as well simultaneously with performing their primary function (mean speed measurement).
