03 TRIBIIUVAN UNIVEITSITY

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INSTITUTE OF ENGINEERING
J*-'gL -- iPi _ _ * _-_trl!&rlr- g! _ j
Examination Control Division il*rrrygrg, -BrE- i P-"::IgE .g-- i
2075 Ashrvin
-
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Candidates are required to give their answers in their own u,ords as far as practicable.
Attempt AII questions.
All questions carry equal marlcs.
Necessqrv ligwes ar.g attached herewith.
Assume suitable data if necessary.

1. What are the basic requirements of intersection at grade? Mention the importance of
street lighting.

Explain different types oftraflic islands? How accident study is carried out?
J. Two vehicles A and B approaching at right angle. Vehicle A from West and vehicle B
from south collides each other. After the collision, vehicle A skids in 49o N of W and
vehicle B Skids 27"8 af N. The initial skid distance of vehicle A and B arc 37 m and
19 m respectively before collision. If weight of vehicle A is 4 torure and weight of vehicle
B is 6 tonne. The skid distances after collision for vehicle A is 15 m and for vehicle B is
36 m. calculate the initial speeds of vehicles if the average skid resistance of the
pavement is found to be 0.55.

4. A four-legged right angled intersection is to be signalized with a fixed time 2-phase

signal- The design hour florv and saturation flow are as under:
North fN) South (S) East (E) West {W)
Design hour flow 900 500 800 700
Saturation flow 2500 2000 3200 3000
The lost time is 2 seconds per phase due to starting delays and amber time for north-
south and east-west are 3 seconds and 4 seconds respectively. Determine the optimum
cycletime.Allocatedthegreentimestothetwophases., . _, r .,., i

5. Explain the factors that controlled the pavement design?

-6. Design the flexible pavement for 4-lane single caniage way road with the following
parameters:

i) Initial traffic in each direction: 2000 CVPD

ii) Design life: 15 years
iii) Construction period = 3 years
iv) Traffic growth rate=8To
v) Design CBR value = 67o
vi) Modulus of elasticity of asphalt concrete surface course = 2500 MPa
vii)Modulus of elasticity of bituminous treated base = 1200 MPa
viii) Modulus of elasticity of granular subbase course: 125 MPa
ix) Axle load distribution of commercial vehicles on the road is as folloWs:

Axel Load (khtr) No. of Axles (7o)

10 l5
30 t)
50 20
70 30
90 10
110 i0
1*
7. Describe the rnaterials required and construction procedure of water Bound Macadam
road.
8. Describe the construction steps of cement concrete pavement-

9. Describe briefly maintenance, rehabilitation and reconstruction. Describe the methods of

pavement evaluation.

10. Draw a neat sketch of bridge with its components. Explain the methods of river bank
protection?
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A4 TRIBHUVAN LTNiVERSITY
INSTITUTE OF ENGINEERTNG
Examination Control Division
2074 Ashwin

-{rni-":!,:"f rl-lod"s'u-"-l-+-slteeg[i,ilczTiil
give their answers in their
,r#;?teT:::;:x:'to own words
";;;;;;;;;.
4! questions carry equal marks.
Iy?cessarv figures areJttached
h erev,ith.
Assume suitable doto yn"rurrory.
Normal graphpaper ihoutd be irovided.
-
-1. what are the basic requirements of
intersection at grade? Descrjbe grade
intersection with its advantages separated
Jl"Ou*og"r.
urO
2. Spot speed observation at a particular
link provides the following dat4 calculate
3T"H1T
speed rimit, rninimumsp".Jri*i,,
a"ril;; *o *"i0" speed for regurarion
Speed range (kmph)
Frequency
6.1{,
l0-14 4
r4.18 T
18-22 20
n% 44
26-3A
80
30-34 l B2
34-38 79
3842 - 49
42-46 - 36
+o-)u 26
50-s4. I
s4-58 10
s8-62
- J

3' Describe highway capacity'

Explain the factors which affect
capacity and revel of service.
4. Assuming linear Speed_density
relationship of V = 60_0.43K
v-K, v-e and e-K diagram showing
b) ?o*
3) Find the saturation RowZ
criticar varue
c) Find speed and density ar flow
of l000veh thr
t' design? write down rhe
ff#,,ilX *::ffrffi:li:l,.Pavement sreps or rRC design
:1
6' asphart insriture method from
3:1ff;r::ijif-tffiili,l"llol'*g the fouowing dara of a

;l Fffi:t#ffi *:t$#uivarent singre axre road : 0.e5 x i03 EAL/day

c) Designperiod= 15 ws
d) construction period 16 months :
e) CBR of sub-grade to be taken
5o4 :
r) Erastic modulus of asphalt concrete
surface course = 2500 Mpa
g) Elastic modurus of bitumino*
t
""Lacourse= 1200 Mpa
base
h) Elastic modulus of g.unut*
s,rtb^" = 125 Mpa
Also draw the neat sketches of the
pavement layers.
7' what is Mass Haur Diagram?
what are. the equipment and plants
accomplishment of various activities
oi road construction?
needed for the
t pavements? Exprain rhe
ffiffi!;ffi:::;#n::i"uminous consrrucrion procedure or
9' what is highway maintenance? Exprain
the generar causes of pavement
failures.
t" choice oflocation of bridge site?
#;:il"1m::.affectinglhe Discuss the river bank

***

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 03TRIBHwANI.rNIVERSlTYL}ll=.*-."..-"ffi""t.*i80--i
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20?3

s;iiii as far as practicable'

their answers in their orm words
,/ candidates are required
to give
,/ AttemPt All questions'
./ Alt qiestnns carry equal'n1',k', .
r ew it h'
c es e It p-4 ! I
/ fi s arv ti qu,r i ie'q-ttnecessary'
a ac

,/ ffi"ttable data if
l.Definetrafflcengineering.Explainroadusefcharacteristicsandhuman.vehicle-
400
F dt'ing fsisl period are
traffic on cross roads H and
:ffi flow of,**j
2. n:'"#J
pcu per hour, the i.uo**y on these ioads are-"stimated
as 3 secs and
a'd 250
il"
ar ref timl;;ilii
io' p"a"'tti* crossing is 15 secs' Design
4 secs r.rprrt#v.
*" pft"t"'taffrc signal by Webster's method'
3,Whatistheimportanceofparkingstudies?DescribedifFerenttypesofparking. skid
at a speed.e;timltf by investigatign!^ur 20kmph'
abutment
4. A vehicle hits a bridge pu,r"*"". 60 m on the gravel
G (f;3!i rorloyeo uv ;'tiJ**rit of
marks of 30 m on what ** tl'" initial speed of
vehicle?
approaching the abutm"r, ti-il.iol
shoulder
5.Explaintheconceptgf"*}]f]^"standardaxleload.Whataretheadvantagesofrigid
Pavement
over flexible Pavemenri

Svo oer annum' The

6.Designaflexiblepavementbyusing|'ph*jInst]SteMethodforatlvolanetwoway
iloop.ia"v with gro:wth tu'" ortraffic
.""fi*#i;;;l j'j *a cBR value of suu grade soil
i;';H::A;^';il"1:";;s' i1'tl' i'
pavement
design life is base course
bituminous treated
**"rJt-'u'r*e,ceurse'
is Syo.rrr" *Jaffi;i;ph"i MPtrespeetiv.ery' Assume
- u*i-i-r.l"oG"
granut* ,r"iio'oiotu, izoortm aartdl*S lavers'
anct neat sketch of pavement
constructio";;J;i i8 months.;;;"
T.Whatissurfacedressing?WritedowntheconstructionprocedureofDBSD? road construction?
for the.various activities of
plants needed
8. What are the equipment.and
Describep,im.."o*t,tackcoatandsealcoatwiththeirusefulness.
g.Explainthetypicalfailuresofflexiblepavementwithneatsketches?
bridge with a neat sketch'
How drainage and
component parts of
10. show the various rvhile tunneling?
managed
ventilation prqblems are
***
 05 TNBHUVAN UNIVERSITY iExam.
INSTITUTE OF ENGINEERING
Examination Control Division ir.os'"-o'"
i rrugrarut" ecs
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--LI:gY:S-L3-?
207? Chzitra i-":rr llirr-j jy-[------igss- -- j?-!L't'-
--*- s;t;;- i;E ;atry Fesil*i vs-r (c-!*! 92
candidates are required to give their answers
in their ovrn words as far iis practicable'
Attempt All questions.
All questions carry equat mstKs'
Neiessar.v,fie ures are saaqhed herewith'
Asiume suitable data if rtecessary'

l. Describe various types of traffic control devices-

write down the advantages and

disadvantages of traffi c"signal. .

light
, '.) What are the importanses of street lighting? Describe the factors affecting street
design.

Assumingalinearspeed-densityrelationship,themealr{elspeedisobservedtobe,S0
knr/h near zero densiti ;;,h- ;"".rpon6og
j*n density is 130 veh/km' Assume that the
average length of vehicles is 6 m'
i)Write dorn'n the speed-density and flow-density equations
cornpu,e speed aid density ionesponding to flow of
i000 veh'/hr'
ii and gaps when the florn' is
iii) compute the average headrvays, spaciig, clearance
maximum
25'5 km long during the floating car
4. The following data collected for a section of road
bus and truck
method study. Assumi;; *. equivalency factor of 1, 2 and 3 for each car
",n"
respectively, Calculate no* in pei4n journey speed and running speed in both
rectron of flow
direction
Stopped No. of vehicles from Vehicles in the same
Direction Journey time delay opposite direction direction

Car Bus truck Overtaking Overtaken

Min Sec Min Sec

2 40 L 4 J I
N.S 4 25 1

A ., a
T I 11
S.N 2l 5 LI L -l

+ I
l5 z 4 7
N-S i0 3 I

+ 1n I
1 I 6
S.N l1+

4 I 45 2l 3 z 3 J
N-S 30
liA I 2 2
S.N i6 15 25 2
+ 1
2'l 4 2 5 L
N-S 12 18
4 I a I
i0 55 28 1 J I
S.N
4 I 1 3
i0 IJ 20 3 2
N-S
S-N
A
&t
20 50 29 z i 4
,4!
T
50
i 42 ./.o
I
J 2 2
N-S
A I
AA
4tu
1
35 25 J 3 I
S-N
 5. Differentiate between flexible pavement design and rigid pavement design. Desoribe
* Weatergaad's concept for temperature stresses.
A road pavement is to be designed for a stetch of road with the following pavement
layers:

{ii Mniimurn thickness of asphalt qoncrete on the surface c6urse = fl} mm.
:9P/o
{ti) WS graded Crushed stone aggregate for base course, CbR value
(iii) Fairly.gaded graved for sub-base course, CBR Value=.20%
(iv)Conpacted Soil, CBR value: l0%
(t) gOtpertoentildsub grade CBR Value:i4%

The road has siqgle lane cariage wiy & -caters pres,gnt ApT of 1200 commercial vehicle per day I
wiflr annual growth of 6Vo. The pavement is to be dtisigned for l0 years period. Design fie pavement
sectio[t usAJ mc recommendation for CBR method, The'road is to be compacted with 6 monthr',k=l
from initial traffic count

7. What are the various activities involved in road construction? Explain the construction
procedure ofotta seal.

8. Describe the materials required and construction procedure of Water Bound Macadam
(WBM) road.
9. Describe the causes of failures in flexibie pavement.

10. Explain the methods of river bank protection? Explain the methods of tunneling in hard
soil.

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05 TRIBHWANT'MVERSITY Exem.
INSTTfl.ITE OF ENGINEERING Level BE Full ltflarks 80

Examination Control Division Programme BCE Pass ltfarks 32

2071Chaitra Year / Part IV/I Time 3 hrs.

Subject: - Transportation Engineering II

{ Candida,res are required to give their answers in their own words as far as practicable.
/ Attempt All qtrestions.
/ AA questions carry equal marks.
{ Normal graphpryer shouldbe prwided.
y' Neussam fisrs are otlached herewith.
{ Assume suitable data ifnecessary. .\

1. Define traffic engineering. Describe road users and vehicular charaBteristics.

2. What arc the uses of origin and destination studf Briefly explain the methods of-conducting
this study.
3. Average trip time for office is 30 minutes with standard deviation of 5 min. Assuming
normal distribution of trip time, calculate the followings:
h
a) nobabitity oftrip time being at least 35 minutes
Ui tf Ure *o.king hour starts ait0:OO AM and trip stare at 9:40 AM what is the probability
I. ofbeing late?
4. An isolated signal with pedestrians indication is to be installed on a right angled intersection
Ti
with road A 15 m wide and road B 12 m wide. The heaviest volume per hour for each lane of
road A and road B are 300 and 250 respectively. The amber times for roads A and B are 3
a{d 2 fgpnds respgqtiyely. Dbsign the timings of traffic and pedestrian signal. :
...
5. What do you undeistand by legal axle load and standard axle load? Describe the stresses
induced in the rigid pavement slab. How spacing between contraction joints is calculated in

6.. In the figure below, a pavement system with the resilient moduli, layer coefficient of surface
course and drainage coefficients are shown. If predicted ESAL= lsx106, R = 90olo, So = 0.4
: :
pr€$ent serviceability index 4.2 mdterminal serviceability index 2.7, *lwtthe thickness
ofDr, D and Dr.

Er = 450,000 psi ar--0.44 Dl

* 25,000 psi ry=1.2 Da

Q

$ * l5,000psi mr=12 D.3

' ' It4 = 5o00 Psi

7. Druw a neat sketch of tlpical pav€ment structures. Explain in deail the construction
methodo,lory of Otta Seal.
8. Explain wifi I neat diagranDthi characteristics of mass haul diagram, including free haul,
' over halrl, economic haul, shrinkage and swelling fapJor,
9.;rDbfine road maintenance. De.scribe the failures ofiile flexible pavernent.
lq. Wliat are the methods of pmviding tunnel ventilation? Explain the major fadors controlling
' the selestion ofbridge sites.
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Reliability, R(%)
ro o
utch\t(D (o
aooo o 1.o
ro
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(O E.g,-
ri qlq<
:
FAq
-=oro,
ci-
V)
i c,
!

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l
{
i -. I
J
ln
:

: Estimated total 18-kip equivalent

single-axle load applications, IIl,s (millions) {
i
I

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o
i?L ir'; 36 TI
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(,lr B --
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x.
I.

i:l cr
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o
-
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Effective roadbed soil E I

Resilient modulus, rif^ (ksi) o O

rr
r-.fUS
tJtQO() o
fryITfrryrfrq 3
o
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a. c+
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9. 3
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5 6'
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 03 TRIBHUVAN I.JNIVERSITY Exam.
INSTITUTE OF ENGINEERING Level BE Full Marks 80

Examination Control Division Programme BCE Pass Marks 32

2070 Chaitra Year / Part Iv/I Tirne 3 hrs.

Subject: - Transportation Engineering II (CE703)

/ Candidates are required to give their answers in their own rvords as far as practicable.
/ Attempt All questions.
/ All questions carry equal marks.
/ Necessam figures are attached herewith.
/ Assume suitable data if necessary.
l. Usf-tti6-oU.;cctiwsof accident study. Explain briefly causes and preventive measures of
accidenL

2 Describe channelized intersections with their advantages and disadvantages.

3 The data collected after speed and dclay studies by floating car method on a stretch ofroad 3.2
kni long are given below. Deterrnine the average values of volume, joumey specd and running spced
of drc haffic stream along either dircction.

No- ofvehr
Direction Joumey Total stopped
Trip From opposite
of trip time (min) dclay (min) Overtaking Overtaken
direction
I c-D 6.50 1.58 4 7 270
2 D-C 7-4E t.72 5 4 254
3 c-D 6.v2 t.62 5 4 300
4 D-C 7-82 1.82 3 J 275
5 c-D 6.33 1.40 3 2 295
6 D-C 8.r3 2-10 2 I 280
7 C-D 6.7t t.73 4 4 300
E D-C ?-40 1.85 3 3 230
9 C.D 6.23 L60 4 2 275
,,
i0 D-C 6.98 t-?8 I 242

4. An isolarted signal with pedestrians indication is to be installed on a right angled intersection

with road H of 12 m wide and road F of9:6 m wide. The heaviest volume per hour for each lane
ofH and F are 475 and 325 rcspectively. The approach speeds are 60 and 45 kmph for road H
and road F rcspectively. Design the timinp of traftic and pedesrian signals. Assume amber
times for road H and road F as 5 and 4 secs rcspectively.

j. Explain how &sign traffic is calculated from the data obtained from Eaftic surveys. Give at
last thrce different examples in various design methods-

6. Design the pavement for an existing two lane single carriageway road with thc following
details.
& Initiat trafftc in both direction in the year ofcompletion of construction:5640 CVPD
b. Desiglr life = I0 years
c. Design CBR value = 67o
d. Axle load using the road (CV) = I l8 KN
7 Deiine road constructibn rcchnology, Describe the various activities to be performed for the
road construction.

8. Describe the construction procedure ofbituminous concrete road and check needed for quality
contro!,
9 . Dcfinc road uraintenance. Explain differcnt mealiure to bc taken for gully coirrol rrorks.

t0. lt'hat are thc ftctors to be considered h'r tunnel lighting? What arc the differcnt methods of
rivcr benk protoction work?
 Chart for question no. 6

r000 CBR

tI
900
3'tt
E
E
it.
C EO0
u
E
,o 5,t.
o
c' 6x.
o
?00 .: ?;?t.

o
9?;
c
600
,,-- 10't.
=
F Z* r'-,
6
q
4 #
F
500
-

5C 1oG 'w
Cumulative number of standard axles (msa)

E
E C8R 5%

2 Total
DaEmmt @mmsition
p bltrminous suifacing Granular
F cumulatiy€ Pavamcnt.
traffic (msel thickncss
b.s and
o BC (nunl DBM {mml rub b.s.
I lmml
0 {mml
:lO 5r5' (t 65
20 .640 40 .90
30 basc = 25O
u 655 ito
: s0 6?5'. [6
'108
tzs sub'bare =
2@
r 100 EM 50 Itl,0
150 72lJ 50 160

tR IFFIC (610 !

Eo:o fc! EDsr GEr

t
!

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 04 TRIBHUVAN TJNTVERSITY Exam. Old Back & Earlier
INSTITUTE OF ENGINEEzuNG Level BE Full Marks 80

Examination Control Division Programme BCE Pass Marks 32

2070 Chitra Year I Part IV/ I Time 3 hrs.

S ubj ect : - Transportation Engineerine II (EG723CE)

/ Candidates are required to give their answers in their own words as far as practicable.
r' Auempt any Five questions.
,/ Thefigures in the margin indicate Full Mar!<s.
/ Necessarv figures are afrached herewith.
/ Assume suitable data if necessary.

l. a) What do you mern by Origin and [hstination Study? Explain the various applications of (8)
Origin and Destination studies.
b) What do you mean by Taffic Control Device? Explain in sho( about rhe types of Traffic Signs. (8)

2. a) Compare on-street and off-str€et parking. Draw neat sketches showing parallel and angle kerb (on*treet)
parking geometry. (6)

b),An isolated signal with pedestrian indicators to be installed on a right angled intersection with
road A of 15 m and rcad B of 7 m respectively. The heaviest volume per hour for each lane of
road A and road B arc350 and 250 rcspectively. The approaching speeds for road A and road B
arc 60 kmph and 45 kmph . Design thJ traffic and pedestrian sigiaftimings. (Take amber period
for yellow light signal as 2 to 4 secs and pedestrian walking speed of I ;0 m /sec (10)

3. a) Explain the various types of stresses needed to be considered in the design of rigid
pavement. (8)

b) An exisfiirg single lane mad has to bb upgraded by bituminous pavement fora certain length
by the following considerations. (8)
o
i) Base traffic of 80 kl.l equivalent single axle load (ESAL) = 5.1 I x l0 ESAL pet year
ii) Dcsign period = l?yars
iii) Construction period : i year
iv) Traffic growttr rate = 6Yo
fr
v) 87. 5 pertentite CBR value of sub-grade soil from 7 sample locations = 49lo

vi) Elastic modulus of asphalt aoncrete for surface course, Eos = 2900 MPa
vii) Elastic modulus of emulsified stabiliaid base, E6 = 1600 Mpa

viii) Elastic modulus of granular sub-base, 856 = 125 Mpa

You are required to desigr the pavement from Asohatt tnstitrirte Method . Draw the cross
section offinal pavsment layers considering the thickness ofasphalt concrete on surface course is
not less ttran 50 mm.

4.,a) What is Mass Haul Diagram? Explain its importance in road construction with diagram. ( l0)

b) Discuss the construction procedure of premix bituminous carpet in brief' (6)

5, (8)
a) What aro the causes that resutt the failure of @ment concrete pavement. Explain briefly.
b) Explain pavement evaluation. (8)

6 . Write shprt notes on any four of the following: (4x4)

a) Components of a bridgc
b) Importance of ventilation in tunneling
c) lmportance of road lighting
d) Thirtieth highest hourly traffic volume
e) Construction procedure of gravel road
*tt,l:
 {
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Full.Depth Aephalt Concrele I
I
t
1d i
.',
I
a
,
a i
g :

a
i
d
o
Ir
i i

=67 )
, / / i
E
4)
;
!

= ''q ( t i
E
I

) a i

-r--
E:
=T ,J

OC
E. , f/
-r.;
t'
€r
/
.a
a ,
I
,/ t, / 7 7

10'
rcP 2 .3 1 i ! 5
0. 6r4910, , 3 . I t 7t
Equlvalent a0 kN Slnolsdxlo Load (EAL)

Detlgn Charl Vl-1.

 04 TRIBHWAN I,JNIVERSITY Exam. Regular / Back
INSTITUTE OF ENGINEERING Level BE f,'ull Marks 80

Control Division Programme BCE i Pass Marks 32

2068 Baishakh Year / Part IV/I Time 3 hrs.

Subi ect : - Transportation Engineering II

.'/ Candidates are required to give flieir answers in their own words as far as practicable.
{ Auempt any Five questions.
'/ Thefigures in the margin indicate Full Marks.
/ Necessarv design chari is atiabhed heibwith,.
/
1. a) Define haffic capacity. Describe the factors affecting capacity and level of service. t6l
b) Design the timing of traffic and pedestrian sigrrals of an isolated signai to be installed
at a right angle intersection when road P and Q cross. The data available are: u0l
Road P Road O
i)width 14.00 10.50
ii)
Peak hour naffic volume. Vehicle/hourhane 2t0 t20
iii) Approach speed, Kmph s0 35
2. a) Define ptary intersection. What are the advantages and disadvdntages of rotary
intersection? t8l
b) A vehicle s\ids through a distance of 40m before cbttiOing with another parked
vehicle, the weight of which is 75 percent of the former. After collision both the
vehicles skid through 14m befcire stopping. Compute the initial speed of moving
vehicle. Assume coeffrcient of friction of 0.62. t8l
3. a) An existing two lane single carriageway gravel road has to be upgraded by
bituminous pavernent, to cater the growing traffic demand. Present traffic in terms of
ESA is 0.8 x 103 per day. The regional traffic growth rate is taken as 6.5%oper annum.
Data required for pavement design are as given below. t8l
.i) Design period: 10 years
ii) Construction period: I year
iii) 87.5 percentile CBR value of sub grade soil from 7 sample locations : 5o/o
iv) Elastic modulus of asphalt concrete for surface course E"" = 2000MPa
v) Elastic modulus of crushed stone base Ebur, = 350 MPa
vi) Elastic modulus of granular sub- base Esub-brsc = 250MPa
' You are required to design the pavement by Asphalt krstitute Method. Draw'the cross
section of final pavement layers considering the minimum thickness of asphalt
. concrete on surface course equal to 50mm.
b) What are the factors affecting pavement design? Write down the steps of IRC desigrr
guidelines for rigid pavement. l8l
4. a) What is Mass Haul Diagram? What are the equipments and plants needed for the
accomplishment of various activities of road construction? 12!6)
b) Distinguish between prime coat and tack coat. Explain construction method of surface
dressing. l2+61
5. a) Explain the importance of road maintenance. Describe the maintenance of bituminous
pavement 12+61

b) Ctrassify the bridgdccording to t]'pes of super skucture and span length. Make a
sketch of a bridge section (longitudinal and cross) 4nd plan indicating its elements. t8l
6. Write short note on: (any four) Iaxa]
a) Fixed delay and operational delay b) Spacing and head way
c) Typical failures of the rigid pavement d) Gravel road construction
e) Radius ofrelative stiffness
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" 06 TRIBHWANUNTVERSITY Exam. . Regnlly / Back
INSTITUTE OF ENGINEERING .Level BE Full Marks 80
j Examination Control Division Programmq BCE Pass Marks 32
2065 Bhadra Year / Part IV/I Time 3 tus.

S ub i e ct : : Transportation Engineering II
/ Candidates.are required to give their answers in their orvn words as far as practicable.

'r lnefistt o t *" *orgrn indicate Futl Marks.

/ Necessary charts are attached herewith.
/ Assunle.suitable data if necessary.

1. a) Describe the road user characteristics. Explain their importance in haffic e,ngrneeri4g. l4+2)
b) The following speed data rrvere collected during a two-minute segment of a-spot speed
study (speed in Kmph). [3+3+4]
45,55, 48, 52, 60, 4g,60,42,.52, 65, 64,63, 5g, 56, 6g, 54, 6g, 64,66,70
. Calculate: (i) The time mean speed; (ii) The space mean speed.
What will be the average density of the above haffic skeam if the mean headway is
4.5 sec?
- 2. a) What is grade separation? Mention their tlpes with sketches. Draw a rigtrt angle for:r
legged intersection of two roads and show their various types of conflict points if (i)
both roads are with two way movements; (ii) one road is with one-way and another is
with trvo waymovements. [1+3+4]
b) What are different methods of trafEc control at an intersection? The average normal
flow of traffic on crbss roads A and B during design period are 400 and 300 PCU per

ip* Fg; ttre saturation flow values.oir these maas ari estimated as 1450. and 1150 PCU
hour respectively. The ?ll-red time required foi pedestian crossing is 12 sec.
Design two phase traffic signal byWebster's method. [2+6]
3. a) Classiffpave,ment and explain the functio4s of differentlayers of flexible pavement. t6]
b) An existing single lane gravel rqad has to be upgraded by bituminous pavement for a
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, specified length as it is the demand for catering the. increment in vohrme of heavy
1pffic. In order to estimate the base traffis, traffic surveywas carried out at two points
on the existing pads. The pavement design is based on the following nssumptions. t10l

1) Base trafflc of 82 kN equivalent gingls axle load (ESAL) = 1.888x103 ESAL pet day
ii) Design period: 10 years
iiil Cons-truction period'= l8 months
. iv) Growth rate:6Yo
v) 87.5 percentile CBR.value of zub-grade soil from 7 sample locations :SYo
vi) Elastic modulus of asphalt concrete for surface conrse E." = 2000 MPa .
,- vii) Elastic modulus of crushpd stone base Ebr", = 250 MPa

'
You are asked to design the pavement by Asphalt Institute Method. Draw the cross
section of final pavement layers considering the minimrrm thicloress of asphalt
-concrete on surface course where'is equal to 50mm. Chart is provided.
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4. a) Explain the features of mass-haul diagram with neat sketches. Dbscribe free haul,
over-haul and economic-haul. t8l
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b) Write down .the explanatory note on bituminous eonstructions types: interface i
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treatment; swface rlressingi premixed carpet; asphalt concrete. Pxal

5. a) Write down the methods of structural evaluation of pavement. A number of deflection -
' readings were taken on a pavement. The mean and standard deviation were 1.5 and
0.2 respectively. The allowable deflection is 1.Omm. Determine overlay thickness. 12+6)
b) Classify the bridges according to their structure, material and loading. Draw a sketch
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of the bridge with all it6 components. 14+41

6. Write short note on (any four): [axa]

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a) Traffic flow parameters
b) Maintehdnce in bituminous road
c) Constructionprocedure of WBM road
d) Importance of lighting in tunnel
e) Reverse or tidal flow operation

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