Task 4): 1. motorway (автомагистраль)

2. rush hour (час пик)    

3. overtake (обгон)

4. speed limit (ограничение скорости)

5. accident (авария)

6. traffic jam (дорожная пробка)

Task 5): 1. busy;

2. Go into the fast lane when you overtake other cars...

3. How far is it from...

4. The best way to get to the airport is to take the M25. Oh, remember to drive on the left!