Since　the　cancellation　of　the　provincial　toll　station,　many　electronic　toll　collection　equipment　(ETC)　have　been　laid　on　expressways　across　the　country.　At　present,　the　national　road　network　has　been　realized.　It　has　become　an　urgent　problem　that　how　to　quickly　grasp　the　information　of　equipment　operation　status,　software　parameter　status,　data　transmission　status,　vehicle　traffic　status　and　so　on,　and　accurately　find　the　equipment　fault　or　abnormal　road　traffic　status　in　time,　to　effectively　improve　the　operation　quality　and　traffic　efficiency　of　highway　network.　To　achieve　this　goal,　we　need　to　accurately　locate　the　current　position　of　the　gantry.　At　present　Because　the　Construction　problems　or　Human　error.　the　location　information　of　ETC　gantries　have　been　mistaken　or　missed.　This　paper　innovatively　uses　the　track　data　of　the　special　transportation　vehicles　and　ETC　transaction　data　to　verify　the　accurate　position　of　the　gantry.　Firstly,　the　average　speed　and　travel　time　of　the　sub　road　network　between　toll　stations　are　calculated.　According　to　the　average　speed　and　travel　time,　the　distance　to　each　section　of　the　road　network　is　calculated.　By　comparing　the　calculated　distance　with　the　real　distance,　the　rationality　of　the　gantry　node　position　is　calculated;　The　real　position　of　the　gantry　can　be　obtained　through　the　direction　angle　algorithm,　to　correct　the　position　of　the　gantry.　In　this　paper,　four　expressways　in　Fujian　Province　are　selected　for　experiments,　ETC　trade　data　and　Trajectory　data　of　special　transportation　vehicles　are　from　Fujian　Expressway　Group　Co.,　Ltd.　The　experimental　results　show　that　the　traffic　flow　has　no　effect　on　the　results　of　the　algorithm.　In　the　appropriate　scene,　the　accuracy　of　the　algorithm　can　reach　more　than　70%.　The　experimental　results　verify　the　feasibility　and　effectiveness　of　the　model.　©　2021　ACM.