[1] CAMERON G D B, DUNCAN G I D. PARAMICS — Parallel microscopic simulation of road traffic [J]. The Journal of Supercomputing, 1996, 10(1): 25-53. [2] FELLENDORF M. VISSIM: a microscopic simulation tool to evaluate actuated signal control including bus priority [C]//Proceedings of the 64th Institute of Transportation Engineers Annual Meeting. [S.l.]: ITE, 1994: 1-9. [3] YANG Q, KOUTSOPOULOS H N. A microscopic traffic simulator for evaluation of dynamic traffic management systems [J]. Transportation Research Part C: Emerging Technologies, 1996, 4(3): 113-129. [4] KRAJZEWICZ D, BONERT M, WAGNER P. The open source traffic simulation package SUMO [C]//RoboCup 2006: Proceedings of the 2006 Infrastructure Simulation Competition. [S.l.]: RoboCup Federation, 2006, 1: 1-5. [5] ROUSSOPOULOS N, KELLEY S, VINCENT F. Nearest neighbor queries [C]//SIGMOD '95: Proceedings of the 1995 ACM SIGMOD International Conference on Management of Data. New York: ACM, 1995: 71-79. [6] HU H, LEE D L. Range nearestn-eighbor query [J]. IEEE Transactions on Knowledge and Data Engineering, 2006, 18(1): 78-91. [7] JAGADISH H V, OOI B C, TAN K-L, et al. iDistance: an adaptive B+-tree based indexing method for nearest neighbor search [J]. ACM Transactions on Database Systems, 2005, 30(2): 364-397. [8] HJALTASON G R, SAMET H. Index-driven similarity search in metric spaces (survey article) [J]. ACM Transactions on Database Systems, 2003, 28(4): 517-580. [9] ARYA S, MOUNT D M. Approximate nearest neighbor queries in fixed dimensions [C]//SODA '93: Proceedings of the Fourth Annual ACMS-IAM Symposium on Discrete algorithms. Philadelphia: Society for Industrial and Applied Mathematics, 1993: 271-280. [10] HU L, JING Y, KU W-S, et al. Enforcing k nearest neighbor query integrity on road networks [C]//SIGSPATIAL '12: Proceedings of the 20th International Conference on Advances in Geographic Information Systems. New York: ACM, 2012: 422-425. [11] SEIDL T, KRIEGEL H-P. Optimal multi-step k-nearest neighbor search [C]//SIGMOD '98: Proceedings of the 1998 ACM SIGMOD International Conference on Management of Data. New York: ACM, 1998: 154-165. [12] ELMASRI R, NAVATHE S B. Fundamentals of database systems [M]. 5th ed. Upper Saddle River: Pearson Education, 2008: 652-660. [13] COMER D. Ubiquitous B-tree [J]. ACM Computing Surveys, 1979, 11(2): 121-137.