Handover location technology was employed for collecting road traffic information in a number of field projects,and the project results demonstrate that it is a supplementary and promising means of road traffic information collection for further traffic supervision and maintenance.Because handover location technology is one kind of pattern matching based location technologies,offline handover location positioning is an essential problem to be studied for successfully matching mobile probes on GIS map.Offline handover location positioning method involves two stages,handover location positioning respectively via two weighted models and an optimized model based on the intermediate results obtained in the first stage.A preliminary field test is conducted on a stretch of freeway in the inner suburban region in Beijing,and performance evaluation results show that the proposed method is superior to standard least square model in location accuracy and location precision,which is an effective method of offline handover location positioning.
