Types of Cross-drainage Structures:
The following are the types of cross-drainage structures :
(a) Culverts, having waterway upto 6 m.
(b) Minor Bridges, having waterway in the range of 6-30 m.
(c) Medium size Bridges, having waterway in the range of 30-100 m.
(d) Major Bridges, having waterway greater than 100 m.
(e) Paved dips and Causeway which allow water to flow over the roadway.