In　order　to　analyze　the　relationship　between　drivers＇　route-choice　behavior　and　information　providing　approach　and　psychological　characteristics　of　drivers,　simulation　method　was　adopted　to　study　the　route-choice　behavior　of　completed　rational　drivers　and　boundedly　rational　drivers　under　emergency.　First,　model　of　accident　dissipation　time　was　proposed,　the　progress　of　accident　dissipation　was　analyzed,　and　the　relationship　model　of　accident　dissipation　time　and　drivers　number　flowing　into　the　road　was　established.　Then,　drivers　were　classified　into　completely　rational　drivers　and　boundedly　rational　drivers,　and　route-choice　methods　for　different　drivers　were　proposed.　Aimed　at　different　types　of　drivers,　the　relationship　between　drivers＇　route-choice　and　traffic　volume,　rational　degree,　proportion　of　boundedly　rational　drivers　were　analyzed.　Through　providing　accident　dissipation　time　information,　principle　of　drivers＇　route-choice　in　different　time　was　studied　until　the　influence　of　accident　was　completely　cleared.　The　results　show　that　accident　dissipation　time　is　shorter　when　information　announcing　speed　is　faster　and　proportion　of　completed　rational　drivers　is　smaller.　Accident　dissipation　time　has　no　relationship　with　the　dependence　of　drivers　on　the　forecast　information.　The　greater　proportion　of　rational　drivers,　the　longer　the　time　that　boundedly　rational　drivers　emerge　on　the　road,　and　the　smaller　the　change　degree　of　traffic　flow.　Before　the　road　returns　to　normal　state,　traffic　volume　of　each　road　has　been　greatly　changed.　©　2016,　Editorial　Department　of　Journal　of　Chang＇an　University　(Natural　Science　Edition).　All　right　reserved.