P2H: Efficient Distance Querying on Road Networks by Projected Vertex Separators
Summary: P2H uses projected vertex separators to shrink 2-hop distance labels on road networks. Optimized separator selection and index maintenance for dynamic weights yield smaller indexes and ~2× faster queries on large datasets. (summarized by gpt-5-nano on Feb 09 2026)
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Authors
- 1. Zitong Chen (Chinese University of Hong Kong)
- 2. Ada Wai-Chee Fu (Chinese University of Hong Kong)
- 3. Minhao Jiang (TuSimple)
- 4. Eric Lo (Chinese University of Hong Kong)
- 5. Pengfei Zhang (Chinese University of Hong Kong)
BibTeX Citation
@inproceedings{chen_sigmod21,
title = {{P2H: Efficient Distance Querying on Road Networks by Projected Vertex Separators}},
author = {Chen, Zitong and Fu, Ada Wai-Chee and Jiang, Minhao and Lo, Eric and Zhang, Pengfei},
series = {{SIGMOD} '21},
booktitle = {Proceedings of the {ACM} {SIGMOD} International Conference on Management of Data},
publisher = {Association for Computing Machinery},
doi = {10.1145/3448016.3459245},
url = {https://dl.acm.org/doi/10.1145/3448016.3459245},
year = {2021}
}
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