answer: #Person1# and #Person2# are checking the route from where they live to the airport according to an up-to-day map. #Person2# thinks it shouldn't take them long to cover that distance but #Person1# thinks they should allow themselves plenty of time to get there.
documents: #Person1#: Ok, I'Ve got an up-to-day map. Let's check the route from here to the airport.
  #Person2#: Where are we? Oh, here we are. So we drive to the A120 and turn left.
  #Person1#: No, we turn right. Remember that we are coming from this direction.
  #Person2#: Oh yes! Sorry! Then we drive to the M11 motorway.
  #Person1#: How far is that?
  #Person2#: It's only seven miles. We turn left to join the motorway and drive south.
  #Person1#: According to the map, we get off the M11 at the second junction and join the M25. That's the motorway that goes around the edge of London.
  #Person2#: That's another 15 miles, so that's 22 miles total so far.
  #Person1#: Then we drive west on the M25. we must be careful to turn in the right direction!
  #Person2#: Then we drive on the M25. it turns south. When we reach exit 15, we turn left and go west along the M4.
  #Person1#: Then we take the first Heathrow Airport. What's the total distance?
  #Person2#: The journey around the M25 is 33 miles and then 3 extra miles to get to the airport. So how many miles is that together?
  #Person1#: 22 miles to the M25, 33 miles on the M25, and 3 after that. That's a total of 58 miles, isn't it?
  #Person2#: It shouldn't take us very long to cover that distance. Remember that we can go quite fast on the motor way.
  #Person1#: We can only go fast on the motor ways if there isn't much traffic. I think we should allow ourselves plenty of time to get there. Being early is much better than being late.