PROBLEM TO BE SOLVED: To reduce the work of a traffic manager by achieving reliable vehicle key management corresponding to a drivers state and the efficiency of traffic result verification.SOLUTION: The traffic management system 10 includes: an authenticating means 110 for executing processing for making person himself/herself authentication successful in collating a read information of a portable storage medium 50 with person himself/herself information to find the coincidence of both of them a determining means 111 for receiving a measurement result from an alcohol detection device 150 or a measurement result of a blood pressure measuring instrument 160 to execute determination as to whether alcohol concentration is not higher than a prescribed reference value or whether blood pressure is within the range of prescribed reference when authentication is successful and a permission setting means 112 for retrieving a vehicle in which a corresponding driver is set as a vehicle driver from a traffic schedule table 127, setting key usage permission data including a vehicle ID of the vehicle in the portable storage medium 50, and sending a medium ID of the drivers portable storage medium 50 and door opening permission data including the vehicle ID to a key box 200 when the alcohol concentration is not higher than the prescribed reference value or when the blood pressure is within the range of prescribed reference.COPYRIGHT: (C)2010,JPO&INPIT【課題】運転手の状態に応じた確実な車両鍵管理や運行結果検証の効率化を実現し、運行管理者の作業を軽減する。【解決手段】可搬記憶媒体50の読み取り情報を本人情報に照合し両者が一致した場合に本人認証成功とする処理を実行する認証手段110と、認証成功であった時にアルコール検知装置150から測定結果ないし血圧測定装置160から測定結果を受信しアルコール濃度が所定基準値以下であるかの判定か血圧が所定基準範囲内であるかの判定を実行する判定手段111と、アルコール濃度が所定基準値以下または血圧が所定基準範囲内である時、運行スケジュールテーブル127から該当運転手が車両運転手として設定されている車両を検索し該当車両の車両IDを含む鍵使用許可データを可搬記憶媒体50に設定し、該当運転手の可搬記憶媒体50の媒体IDおよび車両IDを含む扉開放許可データをキーボックス200に対し送る許可設定手段112とから運行管理システム10を構成する。【選択図】図1