Common use of Vertical alignment Clause in Contracts

Vertical alignment. The vertical alignment of any highway should be as smooth as economically feasible, that is, there should be a balance of cutting and filling to eliminate the rolling nature of land. In the use of the maximum vertical gradient, it should be kept clear in the mind of the designer that, once constructed to a given vertical grade, the highway cannot be upgraded to a lesser gradient without the loss of the entire initial investment. The maximum vertical grade shown in table 8 should be used for all highway classes. Table 8. Maximum vertical grade Terrain classification Maximum vertical grade Level (L) 4 per cent Rolling (R) 5 per cent Mountainous (M) 6 per cent Steep (S) 7 per cent It is desirable to provide a climbing lane to up-gradient highways with heavy truck traffic where the length of the gradient exceeds the values in table 9. The critical length of gradient section for the provision of a climbing lane is recommended for highway classifications Primary and Class I, as shown in table 9. Table 9. Critical length of gradient section for the provision of a climbing lane Terrain classification Primary Class I Level (L) 3 per cent – 800 m 3 per cent – 900 m 4 per cent – 500 m 4 per cent – 700 m Rolling (R) 4 per cent – 700 m 4 per cent – 800 m 5 per cent – 500 m 5 per cent – 600 m Mountainous (M) 5 per cent – 600 m 5 per cent – 700 m 6 per cent – 500 m 6 per cent – 500 m Steep (S) 6 per cent – 500 m 6 per cent – 500 m 7 per cent – 400 m 7 per cent – 400 m

Vertical alignment. The vertical alignment of any highway should be as smooth as economically feasible, that is, there should be a balance of cutting and filling to eliminate the rolling nature of land. In the use of the maximum vertical gradient, it should be kept clear in the mind of the designer that, once constructed to a given vertical grade, the highway cannot be upgraded to a lesser gradient without the loss of the entire initial investment. The maximum vertical grade shown in table 8 should be used for all highway classes. Table 8. Maximum vertical grade Terrain classification Maximum vertical grade Level (L) 4 per cent Rolling (R) 5 per cent Mountainous (M) 6 per cent Steep (S) 7 per cent It is desirable to provide a climbing lane xxxx to up-gradient highways with heavy truck traffic where the length of the gradient exceeds the values in table 9. The critical length of gradient section for the provision of a climbing lane xxxx is recommended for highway classifications Primary and Class I, as shown in table 9. Table 9. Critical length of gradient section for the provision of a climbing lane xxxx Terrain classification Primary Class I Level (L) 3 per cent – 800 m 3 per cent – 900 m 4 per cent – 500 m 4 per cent – 700 m Rolling (R) 4 per cent – 700 m 4 per cent – 800 m 5 per cent – 500 m 5 per cent – 600 m Mountainous (M) 5 per cent – 600 m 5 per cent – 700 m 6 per cent – 500 m 6 per cent – 500 m Steep (S) 6 per cent – 500 m 6 per cent – 500 m 7 per cent – 400 m 7 per cent – 400 m

Vertical alignment. The vertical alignment of any highway should be as smooth as economically feasible, that is, there should be a balance of cutting and filling to eliminate the rolling nature of land. In the use of the maximum vertical gradient, it should be kept clear in the mind of the designer that, once constructed to a given vertical grade, the highway cannot be upgraded to a lesser gradient without the loss of the entire initial investment. The maximum vertical grade shown in table 8 should be used for all highway classes. Table 8. Maximum vertical grade Terrain classification Maximum vertical grade Level (L) 4 per cent Rolling (R) 5 per cent Mountainous (M) 6 per cent Steep (S) 7 per cent It is desirable to provide a climbing lane to up-gradient highways hi ghways with heavy truck traffic where the length of the gradient exceeds the values in table 9. The critical length of gradient section for the provision of a climbing lane is recommended for highway classifications Primary and Class I, as shown in table 9. Table 9. Critical length of gradient section for the provision of a climbing lane Terrain classification Primary Class I Level (L) 3 per cent – 800 m 3 per cent – 900 m 4 per cent – 500 m 4 per cent – 700 m Rolling (R) 4 per cent – 700 m 4 per cent – 800 m 5 per cent – 500 m 5 per cent – 600 m Mountainous (M) 5 per cent – 600 m 5 per cent – 700 m 6 per cent – 500 m 6 per cent – 500 m Steep (S) 6 per cent – 500 m 6 per cent – 500 m 7 per cent – 400 m 7 per cent – 400 m