Acta Geodaetica et Cartographica Sinica ›› 2023, Vol. 52 ›› Issue (8): 1330-1341.doi: 10.11947/j.AGCS.2023.20220063

• Photogrammetry and Remote Sensing • Previous Articles     Next Articles

The U-Turn information collecting method using vehicle GNSS trajectory data

WANG Zihao1, TANG Luliang1,2, YANG Xue3, DAI Ling4, LI Chaokui2   

  1. 1. State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430079, China;
    2. National-Local Joint Engineering Laboratory of Geo-Spatial Information Technology, Hunan University of Science and Technology, Xiangtan 411201, China;
    3. School of Geography and Information Engineering, China University of Geosciences, Wuhan 430074, China;
    4. Baidu Inc. Beijing 100089, China
  • Received:2022-01-25 Revised:2022-11-18 Published:2023-09-07
  • Supported by:
    The National Natural Science Foundation of China (Nos. 41971405; 41671442; 41901394); The Fundamental Research Funds for the Central Universities

Abstract: With the rapid development of intelligent transportation and refined navigation technology, the requirements of coverage, accuracy, richness and freshness for road maps are becoming higher and higher. As a significant element in connectivity of urban road network, U-Turn has become an important part of road data renewal. It is high-cost and long-term to update by existing professional surveying and mapping models, resulting in poor reality of U-Turn data. In this paper, using vehicle GNSS trajectory big data, an automatic U-Turn information collecting approach is proposed. The turning round point pairs and turning round behaviors are first extracted through trajectory tracking. Then, DBSCAN algorithm is used to extract turning round clusters. Next, a support vector machine model is built based on traffic flow proportion to eliminate illegal turning round behaviors. Finally, U-Turn positions and spatial structures are identified according to distribution characteristics of U-Turn clusters. Taking vehicle GNSS trajectory data of DiDi in Wuhan as an example, the experiment detects 183 road sections in Jianghan District. The recognition recall rate of U-Turn structures was 88.3%, and the precision rate was 87.6%. At the same time, the horizontal and vertical position accuracy of U-turn positions are 3.40 m and 5.90 m, respectively. Results show that the proposed method can effectively collect the position and structural category of U-Turn from vehicle GNSS trajectory big data, and can provide a promising solution for short-term and low-cost collection of U-Turn data.

Key words: vehicle GNSS trajectory data, U-Turn information, trajectory tracking, urban road network

CLC Number: