[-Sneaky-]

pawn Код:

public OnPlayerStateChange(playerid, newstate, oldstate)
{   
  if(newstate == PLAYER_STATE_DRIVER) // if the new state of a player is driver then continue
  {
    if(GetVehicleModel(GetPlayerVehicleID(playerid) == 596)) // if the vehicle the player is stepping into is 596 (LSPD CAR)
    {
      RemovePlayerFromVehicle(playerid); // remove the player from the vehicle
      return 1;
    }
  }
  return 1;
}

This is just a simple example, ofcourse you will have to edit it. For a list of vehicles model id's goto: https://sampwiki.blast.hk/wiki/Category:Vehicle