public OnPlayerStateChange(playerid, newstate, oldstate)
{
    if(newstate == PLAYER_STATE_DRIVER)
    {
        if(PlayerInfo[playerid][Job] != truck_driver* && GetPlayerVehicleID(playerid) == Truck**)
        {
            SendClientMessage(playerid,-1,"You are not the trucker.");
            RemovePlayerFromVehicle(playerid);
        }
    }
}

RemovePlayerFromVehicle(playerid)
{
    new Float:t_x, Float:t_y, Float:t_z, Float:t_s, t_v = GetPlayerVehicleID(playerid);

    GetVehicleModelInfo(GetVehicleModel(t_v), VEHICLE_MODEL_INFO_SIZE, t_s, t_s, t_s);
    GetVehiclePos(t_v, t_x, t_y, t_z);

    //Place the player on top of the vehicle...
    SetPlayerPos(playerid, t_x, t_y, t_z + (t_s / 2.0) + 0.5);
}