YHD-10.128 Road and street maintenance	11.1.2008 / JV

1. How is the asphalt surface affecting the friction values on a wet road?

2. Which are the differences between the winter maintenance of an airfield and road?

3. Which factors are specifying the quality of winter maintenance in Finland?

4. What is hoar rost and when and how does it occur on a road?

5. Describe different kinds of snow ploughs!

6. Write about the following defects:
a) Ravelling
b) Alligator cracks
c) Settlements

7. Which are the advantages and disadvantages of liquid salt when preventing slipperiness?



Max. pisteet

1.	3p
2.	4p
3.	5p
4.	3p
5.	4p
6.	3p
7.	3p
Yht.	25p