Railway Engineering 6th semester
Introduction to Railway Engineering (Lecture # 1) Subject : Railway Engineering Department of Transportation Engineering and Management, UET Lahore.
What is railway? “A railway can be defined as an engineered structure consisting of two metals guiding rail on which cars are either self propelled or pulled by a locomotive.”
What is railway engineering? “Branch of Transportation Engineering involved in the planning, design, construction, operation and maintenance of railway land facilities used for the movement of people and goods serving the social and economic needs of contemporary society and its successors.”
Why Railways are built? There could be several reasons, some might be: •
Military Purpose (strategic conditions)
C
•
Linking of trade centres
•
Connecting port with interior of country
•
Shortening existingAroute
______ ACB (Existing Line) -------- AC’B (Proposed shortened line) B
C ’ •
Laying of a Branch Line
D ______ ACB (Main Line)
A
B C
-------- ACD (Proposed Branch Line)
Railway Engineering 6th semester
Place of Railways in Society At one point in time, railroads were most important (In terms of usage) part of transportation system, because they were the only ones which made the mass movement of people and goods possible. Today railway industry is famous for its use in transport of e p t c b q u c d m h o u n o r ll e if a freight. o a m a if m t n f i d l t t
Because of their higher weights and increased volumes, bulk products like coal, iron ore, wheat, building material, etc. railways as the mode of their transportation is desirable as compared to other modes.
u c e / s
Comp Compar aris ison on Amon Among g Mode Modes s (Fre (Freig ight ht Transport)
p a n ie s
w e e n
it y
o r m in
p a n ie s
e r e n t
y
s o ld b y
a n d / o r
A commuter is a person who makes the journey from home to work and back every working day using some form of transportation system
Motor Truck: Rapid movement of freight over short distances and flexibility of movement in urban areas. Airlines: Rapid service for passengers, mail and small shipments of lightweight, valuable commodities where speed is a controlling factor Waterways: Bulk freight is transported at low cost but slow speed. Pipelines: Direct, low cost and dependable movement of petroleum and gas. Railroads: Provide rapid, economical and dependable movement for all types of commoditi commodities es especially especially bulk freight. freight. Mass commutati commutation on is also possible through railways (interchangeably called as railroads)
Right of Way “A railway right of way, abbreviated as ROW or R/W, is the land upon which the roadbed and other necessary facilities are constructed.” On single track railways, the width of R/W is usually measured at right angles to the centre line of track and from the centerline to the edge of the railway’s property, a boundary known as right of way line. On a multiple mu ltiple track railway, PAKthe centre line of the R/W may coincide with the centerline of one of WATCH the tracks or it may come midway between the tracks.
R/W is usually 100’ in Pakistan
p r o d u c e d
u s u a ll y
g o o d w h ic h is :
A c o m m o d t i y is a
Railway Engineering 6th semester Width of Right of Way Common widths are 50’, 60’, 80’, 100’, 200’, or even 400 ’. Within station limits the width is increased to incorporate necessary structures, stru ctures, facilities and tracks.
What should be considered while acquiring Right of Way? 1. Dept Depths hs of cut cuts s and fil fills ls 2. Slopes 3. Sid Side ditc ditche hes s 4. Erosive Erosive action action of wind wind and and water, water, etc. 5. Futu Future re doub double le trac tracki king ng 6. Price of land, land, as the land value value increases increases after construct construction ion of railway railway facility. facility. Increasing or acquiring R/W afterwards could be more costly.
