Comservative

CE 403: Transportation Engineering Lecture No. 06 L t N Date: January 20, 2011 y ,

Geometric Design of Highway

Cross section elements Sight distance considerations Horizontal alignment details Vertical alignment details Intersection elements

C. Kolay, Asst. Prof. and A. Pani, Lecturer  SCE, KIIT Unviersity, Bhubaneswar

Cross Section Elements

Pavement surface characteristics Cross slope or camber Width of pavement or carriageway Kerbs Road margins g Width of roadway or formation Right of way Typical cross sections of roads

C. Kolay, Asst. Prof. and A. Pani, Lecturer  SCE, KIIT Unviersity, Bhubaneswar

Width of Pavement or Carriageway

2.5 m 0.625 m shoulder 3.75 m Single lane pavement 0.5 05m 0.625 m shoulder

0.5 05m

2.5 25m

1.0m 1 0m

2.5 25m

shoulder 7.0 m Two lane pavement

shoulder

C. Kolay, Asst. Prof. and A. Pani, Lecturer  SCE, KIIT Unviersity, Bhubaneswar

Width of Pavement or Carriageway…

Depends on width and no. of traffic lanes

Carriageway intended for one line of traffic movement- traffic lane Lane width is determined based on

width of vehicle (max dimension 2.44 m recommended by IRC) Minimum side clearance Width of traffic separator or medians if any

C. Kolay, Asst. Prof. and A. Pani, Lecturer  SCE, KIIT Unviersity, Bhubaneswar

Width of Pavement or Carriageway…

Width of carriageway recommended by IRC

Sl. Class of road Sl No. 1. Single lane g (i) Village road (ii) Urban road without kerb Two lanes, without raised kerbs Two lanes, with raised kerbs Intermediate carriageway (except of important roads) Multi-lane pavements p

C. Kolay, Asst. Prof. and A. Pani, Lecturer  SCE, KIIT Unviersity, Bhubaneswar

Width (m)

3.75 3.0 3.5 7.0 7.5 5.5 55

2. 3. 4. 4

5.

3.5/ lane

Traffic separator

Prevent head on collision between vehicles moving in opposite direction

footpath kerb p pavement traffic separator p pavement

C. Kolay, Asst. Prof. and A. Pani, Lecturer...