PRELIM HIGHWAY AND RAILROAD ENGINEERING

Definition of Transportation Engineering

Science deals with efficient, safe, economical, comfortable and speed movement of good and persons

Definition of Highway Engineering

It covers the construction of roads and providing the facilities to road user and planning for safety or road vehicles etc.

Definition of Railway Engineering

It deals with the lying of the railway track for movement of heavy locomotives, wagons etc. It deals also with control of movement with help of station yards.

Definition of Geometric Design

deals with the dimensions and layout of visible features of the highway, design fulfills the requirements of the driver and the vehicle, such as comfort, efficiency and safety, help in the reduction of accidents and their severity

Types of Alignment

Horizontal Alignment, Vertical Alignment

The Parts of the Road Cross Section (Side View)

Carriage way

Road Shoulders

Right of way

Side slope

Carriage way

The Width of Pavement way on which vehicles travel is called carriage way

Road Shoulders

Provided along the road edge to serve as an emergency lane for vehicles

Right of way

the area of land acquired for the land along its alignment, distance between boundary stones of road on either side of the road

Side Slope

Slope of earthwork in Filling (embankment) or cutting is called sideslope

Berm

The road toe and inner edge of borrow pit, prevents the erosion of embankment soil

Side drain

drainage of rain water, are provided on either side of the road

Kerbs

The boundaires between pavement and shoulders or footpath are known as kerbs

Camber

or cross slope, slope provided to the road surface in the transverse direction to drain off rain water from the road surface