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Morgan State University
Faculty of Engineering
Department of Civil Engineering
CEGR 416: Transportation Engineering
Dr. Charles Oluokun
HIGHWAY DESIGN PROJECT
By
Mohammed Alburaidi
May 10, 2017
Spring 2017
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Table of Content
page
1. Cover page ……………………………………………………………..……1
2. Table of content ……………………………………………………………..2
3. introduction………………..…………………………………………………3
4. Selection for Alignment for design….………………………………………..3
5. Data Collection:…………………..…………………..……………….….…..4
6. Design Standards and Assumptions…………..…….………………….……..5
7. Calculations ………………………………………………………….……….6
8. Recommendations……..…….…………………………….………….………7
9. Conclusion……..…….………………………..…...………………….………7
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I.
Introduction:
The purpose of this project was to create a highway design with 8 lanes and a 400 ft median. The
highway design will be based on the coordinates provided us which started at the point 514,000N and 712,000-E and ended at the point 509,000N and 720,000-E. This highway design was
implemented by observing different ways of exiting as well as the surroundings to come up with
the most efficient route for my high way design. My design uses the simplest way to include the
highway I-270 and my design will also be good for the traffic being projected in the year 2052.
II.
Selection for Alignment for design:
According to the topographic map and the coordinates given we were able to select the
alignment for our design. The highway we designed included 3 major curves based on the
parameters given. We looked at the map very carefully and thorough fully to make sure there
wasn’t any obstacles in the way. We also made sure to look out for any already existing
highways or building structure. On the map there were different structures like a park, a hospital,
and residential areas as well as wooded areas filled with trees. We used the different coordinates
and we made designed our highway.
Station
Elevation
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
600
633
600
575
525
550
596
575
550
575
600
615
600
606
625
650
650
658
630
625
3
21
22
23
24
25
26
27
28
29
30
600
600
625
660
625
600
575
575
575
600
Elevation vs Station
Elavation
700
600
Elavation
500
400
300
200
100
0
0
5
10
15
20
25
30
35
Station
III.
Data Collection:
• Traffic Count:
For our project we counted traffic northbound and southbound start from Perring
Parkway intersect with Oakleigh road and end with Perring parkway inter sect with and Taylor
avenue. We counted traffic for 15 minute intervals for about one hour. Northbound, for the first
15 minutes there were 178 cars that were on the road. For the next 15 minutes, there were 165
cars. For the next 15 minutes, there were 182 cars. And for the last 15 minutes, there were 174
cars. Southbound, for the first 15 minutes there were 149 cars that were on the road. For the next
15 minutes, there were 157 cars. For the next 15 minutes, there were 162 cars. And for the last
15 minutes, there were 145 cars.
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•
Traffic Projections:
Interstate Perring Parkway Annual Average Daily Traffic 2001-2010
YEAR
SOUTHBOUND
NORTHBOUND
TOTAL
2001
129878
134254
264132
2002
134231
126746
260977
2003
136265
131968
268233
2004
142534
122947
265481
2005
143534
137564
281098
2006
113243
110906
224149
2007
142538
130086
272624
2008
128976
122953
251926
2009
118769
117640
236409
2010
113427
110854
224281
The data table above was collected from the Maryland State Highway Administration (SHA). It
shows the traffic count for I-270 from different directions including southbound and northbound
following by the total amount of cars that year. With this rate by the year 2052 the estimated
projection for traffic count is about 320,898. This number was calculated because every year
from 2001-2010 the traffic number increased by 1.5% so by the year 2065 that should be the
estimated number of cars heading north and southbound.
IV.
Design Standards and Assumptions
Design Speed:
Design Speed= 75 mph
5280
75 mi/h= (75 x 3600) ft/sec = 75 x 1.47 = 110.25 ft/sec
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V.
Design calculations
• Calculations:
➢ Curve 1 G1= +5%, G2= -5% (crest)
L min (ft)
Location/Elevation
of PVC
Location/Elevation
of PVI
Location/Elevation
of PVT
1150
10+00 / 450
18+50 / 580
24+00 / 535
➢ Curve 2 G1= -3%, G2= +3% (sag)
L min (ft)
Location/Elevation
of PVC
Location/Elevation
of PVI
Location/Elevation
of PVT
1025
24+00 / 535
29+00 / 575
40+00 / 575
➢ Curve 3 G1=+5%, G2= -2% (crest)
L min (ft)
Location/Elevation Location/Elevation Location/Elevation
of PVC
of PVI
of PVT
1556
40+00 / 575
55+00 / 570
67+00 / 570
VI. Project Costing:
New Construction 7 Lane Highway Projected
Costs ($)
Construction cost LRE
$7,097,845
MOT*
$708,785
Mobilization*
$770,763
Subtotal
$8,378,393
Scope Contingency (25%)
$2,844,598
Total construction cost
$10,222,991
PE Design (15%)
$2,383,449
CEI (15%)
$2,383,449
Total Project Cost
$14,989,888
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VII. Recommendations:
We would recommend for our design based on our data that the speed should be reduced to 50
miles per hour. This will slow everything down and it will allow safety to be the number one
key. This will give people a safer stop distance, a safer passing distance and it will allow for
eighteen wheelers to be able to travel safely on the highway as well. This is going to be an 8
lanes highway; safety is the one and only priority to our design process. We need to think about
construction, weather, and accidents and still make sure everyone is still safe.
VIII. Conclusion
After finishing this project and looking at it thoroughly I believe that this highway can be
done as a safe form of transportation. This highway will consist of 8 lanes. Each lane should be
4ft wide. This highway will also have only 3 vertical and horizontal curves. The research,
calculations and results helped me to clearly show me how to design this highway and to make
sure it is the best design possible. This all helped me to make an efficient and useful project.
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