Disaggregate Traffic Forecasting and Diversion analysis for Inter-Regional Traffic Corridor
1. P.G. section in Transportation Engineering & Planning
DEPARTMENT OF CIVIL ENGINEERING
SARDAR VALLABHBHAI NATIONAL INSTITUTE OF TECHNOLOGY SURAT, INDIA
DISSERTATION (CE-864)
“DISAGGREGATE TRAFFIC FORECASTING
AND DIVERSION ANALYSIS FOR INTER-REGIONAL TRAFFIC
CORRIDOR USING ECONOMETRIC APPROACH”
Presented by :
Rahul Deshwal
(P17TP003)
Guided by:
Prof. G. J. Joshi
Dr. S. S. Arkatkar
1
2. CONTENTS
I. Introduction
II. Need for Study
III. Literature Review
IV. Objectives and Scope of Work
V. Methodology
VI. Study Area
VII.Data Collection and Analysis
VIII.Employment Forecasting
IX. Traffic Prediction for NH-48
X. Diversion Analysis
XI. Results and Discussion
XII.References
2
3. Introduction
Planning is the process of thinking about the activities required to achieve a
desired goal.
Planning of the region is done in two aspects:
Economic planning, and
Physical planning.
Transportation system plays an important role in economic, industrial, social and
cultural development for the region. Hence, Regional planning of transport
infrastructure for the region's connectivity and circuity with the other regions
becomes crucial.
Regional transportation planning provides integration of transportation plan with
land use plan of the region.
Road transport in India is the dominant mode of transport
65% of freight movement, and
85% of passenger traffic.
The National Highways network of 115,435 km contributes to about 2.7% of the country’s
road network and carries about 40% of total traffic.
3
4. Need of Study
The Mumbai–Ahmedabad Corridor in the western part of the country is one of the
important transport corridors of the country.
Industries like, textile industry, gems and jewelleries, petrochemical & fertilizer and
other industrial complexes have been established along this corridor.
According to EIA report submitted by ICT Pvt. Ltd.,
The average journey speed on Mumbai-Vadodara section of NH-48 was found 50-60
km/hr whereas a NH is designed for the speed of 100 km/hr.
NH-48, 6-lane highway, was carrying traffic in the range of 50,000 to 80,000 PCU per
day in 2013 and reached LOS E in 2015 itself.
Report has growth factor and elasticity based aggregate traffic forecast which
undermines the individual growth patterns of different vehicle class.
4
5. Author Title Review and Findings
Stephen Fretz,
Christoph Gorgas
(2013)
Regional economic
effects of transport
infrastructure
expansion:
evidence from the
Swiss highway
network.
The main aim of the study was to quantitatively assess the
impact of improved regional accessibility. Variables such
as GDP, unemployment rate and industrial structure.
They concluded that improved transport infrastructure
network shows improvement in intangible benefits at
regional level, and also labour market play an important
role for infrastructure expansion to generate benefits in
terms of income.
Ying Jin,
Ian Williams
(2000)
A new regional
economic model for
European transport
corridor studies.
The author reported the development of new operational
model for assessing the socio-economic impact of
strategic transport initiatives.
They have described the likely use of regional economic
model for transport.
They linked transport demand forecast with regional
economy via regional economic model and assessed the
impact of transport in context of that regional economy.
Literature Review: Regional Economy5
6. Author Title Review and Findings
Jim Yoo Kim, Jung
Hoon Han.
(2015)
Straw effects of
new highway
construction on
local population and
employment
growth.
The study was carried out to examine the rising concern of
straw effects of new highway using difference-in-
difference model to measure effects of new highway on
local population and employment growth.
The results revealed that no evidence of the straw effects
were found and not only the new highways contribute to
increasing population and employment in lagging areas but
also improve the accessibility of existing highway.
Uwe Blien,
Tassinopoulos
(2001)
Forecasting
regional
employment
The authors described forecasting of employment was
based on entropy optimizing procedure, a newly developed
for the estimation of matrices from heterogeneous
information.
Simple linear regression using first differences between
years was developed for estimating the trend of
employment.
They found employment forecasting becomes necessary as
the change in employment causes change in vehicle
ownership.
Literature Review: Employment Forecasting6
7. Author Title Review and Findings
Kartikeya Jha,
Nishita Sinha, S.S.
Arkatkar
(2012)
Modelling Growth
Trend & Forecasting
Techniques for
Vehicular Population
in India.
Trend Line Analysis of last 25 years was carried out.
Econometric regression models were also developed using
variables such as population and per capita income.
Time Series Analysis was also done using the Box and Jenkins
Methodology.
They found ARIMA models of Box and Jenkins methodology
perform better than trend line analysis and econometric
regression analysis.
Shabana Thabassum
(2013)
Impact of state-wise
vehicle contribution
on traffic growth
rates for National
Highways
The impact of different state vehicular growth on the state
highway.
Socio-economic variable such a population, NSDP and per
capita income (PCI) were used to determine the elasticity of
transport demand and develop regression models.
Traffic growth rate for different categories of vehicle was
determined, and forecasted traffic was used for financial
analysis and pavement design.
Indian Road
Congress
(2015)
IRC: 108-2015
Guidelines for
Traffic Forecast on
Highways
It provides methodology for traffic forecasting process.
Literature Review: Traffic Forecasting7
8. 8
Stage – 3
Forecasting of Travel
Stage – 2
Analysis of Base Year Travel
Stage – 1
Preparatory Works
Study of the Base Year Transport Network Map
Reconnaissance Survey
Identification of the PIA and TAZs
Identification of the Homogenous Traffic Sections
Identification of Primary Surveys and
their Locations
Primary Traffic Studies
Base Year Traffic Analysis
Normal Traffic
Forecast
Identification of Secondary Data and
their Sources
Collection of Secondary Data
Estimation of Growth
Factor for Normal Traffic
Developmental Traffic
Forecast
Total Traffic Forecast
Horizon year Transport
Network
Generated Traffic Forecast
Source:- IRC:108-2015 Fig. A.1 Traffic Forecasting Process
9. Contd.
Traffic Growth Forecast
9
AADT
Normal Traffic
Forcast
• Past Traffic Trend
• Past trend of Vehicle
Population
• Elasticity of Transport
Demand
• Time Series (SMA, DMA,
SES, ARMA, ARIMA, etc.)
Developmental
Traffic Forecast
• New township
• Industrial unit or SEZ
Generated
Traffic Forecast
• Diverted Traffic
• Induced Traffic
10. Objectives
The main objectives of this research work are as follows:
To analyse historical inter-regional traffic flow pattern of NH 48 on various temporal
scale
To analyse effect of Regional/National Economic growth on traffic flow of NH 48
To develop appropriate Time Series model for Traffic Forecast and consequent
LOS pattern
To develop models for Diversion Forecast for alternate highway.
10
Scope of Work
Historical traffic data of toll booths in region
Economic growth indicators GDP and GSDP
Impact of the industrial growth of the study region (South Gujarat) on the National Highway 48.
User response survey for diversion analysis
Viability of the proposed Vadodara-Mumbai Expressway in terms of travel demand.
12. The National Highway passes from Major
Cities:-
• Delhi
• Gurugram
• Jaipur
• Ajmer
• Beawar
• Udaipur
• Ahmedabad
• Vadodara
• Surat
• Mumbai
12 NH-48 from Delhi to Mumbai
14. DISTRICTS AND CITIES IN STUDY REGION14
Study Region consist of 5 Districts
of South Gujarat region:
• Vadodara,
• Bharuch,
• Surat,
• Navsari,
• Valsad.
Source: Draft EIA report submitted by ICT Pvt. Ltd., New Delhi
19. Phase 1 consist of construction of 274 km road
stretch
260.4 km is in state of Gujarat,
5.5 km in Union Territory of Dadra and Nagar
Haveli and,
8.1 km in district of Thane in state of
Maharashtra
Existing NH 48 in the same corridor has stretch of
277 km in Gujarat.
• VME is passing through
• Vadodara (54.4km),
• Bharuch (62.5 km),
• Surat (57.3km),
• Navsari (37.6km) and
• Valsad (48.6km)
in the state of Gujarat (260.4km).
19 Vadodara Mumbai Expressway (VME)
21. DATA COLLECTION AND ANALYSIS21
Primary Data
(Questionnaire Survey)
Revealed Preference data
Vehicle Characteristics
Travel Characteristics
Stated Preference data
Priority Ranking
Willingness to Pay
Secondary Data
Classified monthly
traffic data of toll
Road Network
GDP/GSDP data
Industry data
RTO data
22. SECONDARY DATA22
Government Agency Data Collected Period
NHAI – PIU Surat
Classified Monthly Traffic Volume
(Schedule M) of Karjan toll,
Boriach toll and Bhagwada toll
2009-2018
MSME – Development
Institute
Employment and Investment Data
1985-2011
2006-2015
Directorate of Census
Operations, Gujarat
Population, Household and
Employment
1991, 2001,
2011
Planning Commission GDP and GSDP 2001-2018
RTO, Gujarat Vehicle Registration 2000-2018
27. 27
A total of 806 samples were
collected in preliminary and
primary survey removing
samples with
inappropriate/incomplete data.
70 Samples were collected in
preliminary survey on basis of
which 5 locations for primary
survey were finalised.
736 Samples were collected from
5 locations in 2 days time during
primary survey.
PRIMARY
DATA
28. Traffic Entry and
Exit locations
Origin Destination
Gujarat 64 67
Maharashtra 26 20
0
10
20
30
40
50
60
70
80
Percentage%
Movement of Vehicle for Gujarat and Maharashtra
E
N
ENE
Sura
t
Valsad
E
E
E
S
0
5
10
15
20
25
30
Percentage
Location
Distribution of Primary data based on O-D pattern
Origin Destination
28
29. Travel Pattern and
Route Preference
0%
20%
40%
60%
80%
100%
Car LCV Bus Truck MAV
Percentage%
Vehicle Category
Vehicle Category Travel Pattern
Internal to Internal Internal to External
External to Internal External to External
Car LCV Bus Truck MAV Total
Yes 81 70 38 81 85 81
No 19 30 63 19 15 19
0
10
20
30
40
50
60
70
80
90
Percentage%
Vehicle Category
Preference for Vadodara Mumbai Expressway
Region
1
Region
2
Region
3
Region
4
External
External
External
External
I-E & E-I
E-E
I-I
29
30. Descriptive Statistics
45%
12%
20%
23%
Travel Pattern (No)
Internal to
Internal
Internal to
External
External to
Internal
External to
External
16%
21%
24%
39%
Travel Pattern (Yes)
Internal to
Internal
Internal to
External
External to
Internal
External to
External
30
31. Priority for Road Users
0
50
100
150
200
Travel
Time
Travel
Cost
Distance Road Side
Amenities
Prioirty for Car
1 2 3 4
0
10
20
30
40
50
60
70
Travel
Time
Travel
Cost
Distance Road Side
Amenities
Prioirty for LCV
1 2 3 4
0
20
40
60
80
100
120
140
Travel
Time
Travel
Cost
Distance Road Side
Amenities
Prioirty for Bus_Truck
1 2 3 4
0
50
100
150
200
250
Travel
Time
Travel
Cost
Distance Road Side
Amenities
Prioirty for MAV
1 2 3 4
31
59. SAR AND SMA SIGNATURE59
SAR signature: Positive spikes in ACF at lag s, 2s,
3s and positive spike in PACF at lag s.
SMA signature: Negative spike in ACF at lag s, and
negative spikes in PACF at lags s, 2s, 3s.
60. PROCEDURE60
Analysis involves formation of ACF and PACF plots for four different cases
which are:
Plots without any differencing.
Plots with non-seasonal differencing.
Plots with seasonal differencing.
Plots with non-seasonal and seasonal differencing.
61. CONTD.61
For example:
Case with Non-Seasonal and Seasonal Differencing of Karjan toll Car traffic
Model – ARIMA(p,d,q)x(P,D,Q) = ARIMA(0,1,1)x(0,1,1)
69. VOLUME TO CAPACITY ANALYSIS69
LOS THRESHOLD FOR 6-LANE DIVIDED INTERURBAN HIGHWAY SEGMENTS
LOS V/C PCU/day Threshold
A <0.2 <27000 34000 @ LOS-B: Suggested
threshold flow for conversion
from six lane to eight lane
divided road to ensure
enhanced safety in traffic
operations.
B 0.21-0.3 27001-41000
C 0.31-0.5 41001-68000
D 0.51-0.7 68001-95000
E 0.7-1 95001-136000
F >1 >136000
Indian Highway Capacity Manual (Indo-HCM)
74. Diversion Analysis based
on
Origin-Destination
Primary Survey Data
Survey Proportion Percentage
Actual Volume Proportion
Average Volume
Calculation of Utility value
Diversion Proportion (Logit Model)
Highway Traffic
MADT
for
NH48 Toll Plazas
MADT
for
VME sections
DIVERSION ANALYSIS74
75. Karjan Toll
Narmada Toll
Choryasi Toll
Boriach Toll
Bhagwada Toll
National
Highway
48
External
East
External
South
East
External
North
External
South
Vadodara
External
West
Bharuch Surat Navsari Valsad
1 2 3 4 5 6
EXISTING HIGHWAY (NH-48)75
78. V/C FOR TRAFFIC AT TOLL PLAZAS OF
NH48 UPTO HORIZON YEAR 2035
78
0.0
0.5
1.0
1.5
2.0
2018 2023 2028 2033
V/C
Year
V/C Trend for NH-48
Karjan
Narmada
Choryasi
Boriach
Bhagwada
LOS B
LOS C
LOS F
80. 80
Binary Logit model based on vehicle category.
P ΤR2 R1
k
=
eUR2
eUR1 + eUR2
Utility Functions derived from Logit Model.
Uk
R1 = α H_TTR1+ β H_costR1 + γ H_distR1 + C
Uk
R2 = α H_TTR2+ β H_costR2 + γ H_distR2 + C
ROUTE CHOICE MODEL
Where, Pk
(R2/R1) = Probability of shifting from route 1 to 2 for kth vehicle category.
Uk
R1 = Utility function of route 1 for kth vehicle category.
Uk
R2 = Utility function of route 2 for kth vehicle category.
H_costR1/ H_costR1 = Travel cost for route 1 and route 2.
H_TTR1 / H_TTR2 = Travel time for route 1 and route 2.
H_distR1 / H_distR2 = Distance for route 1 and route 2.
C = Constant for unexplained part.
α, β, γ = Parameters or coefficients of the variables in model.
84. UTILITY EQUATION DATA84
Utility Modelling
• Using primary survey data for each vehicle category.
• Each data set was converted into 1-4 choice sets based on responses of
respondent for Willingness to pay section.
Logit Model inputs for Utility Calculation
Distance Based on Entry and Exit point of highway for each O-D pair
NH48 Distance between Entry & Exit point of NH48 alignment
VME Distance between Entry & Exit point of VME proposed alignment
Travel Time for each O-D pair
NH48 Travel time on existing route through primary survey data (50 percentile value)
VME Travel time through 10% increase in journey speed (Assumption)
Travel Cost for each O-D pair
NH48 Travel cost on existing route through toll collection
VME
Toll Cost through document with Regd. No. D.L. - 33004/99, The Gazette of
India: Extraordinary, Part II Section - 3, MORTH
Vehicle Car LCV Bus_Truck MAV
NH Speed (KM/hr) 73 64 59 55
VME Speed (KM/hr) 80 70 65 60
Toll Rate per KM 1.08 1.92 3.92 6.24
Toll Rate per Structure 5 7.5 15 22
85. DIVERSION PROPORTION85
O-D Pair Distance
Vehicle Category
Car LCV Bus_Truck MAV
External North External South 260 0.92 0.99 0.89 0.93
External North
External South
East
250 0.92 0.97 0.93 0.96
External North External East 161 0.76 0.85 0.73 0.77
External North Bharuch 91 0.61 0.58 0.63 0.65
External North Surat 124 0.6 0.71 0.5 0.49
External North Navsari 188 0.85 0.92 0.85 0.9
External North Valsad 250 0.11 0.01 0.21 0.13
Vadodara Vadodara 0 0 0 0 0
Vadodara Bharuch 91 0.61 0.58 0.63 0.65
Vadodara Surat 124 0.6 0.71 0.5 0.49
Vadodara Navsari 188 0.23 0.07 0.29 0.22
Vadodara Valsad 250 0.11 0.01 0.21 0.13
External West External South 169 0.87 0.98 0.82 0.87
External West
External South
East
159 0.88 0.96 0.88 0.93
External West External East 70 0.66 0.8 0.61 0.65
86. CONTD.86
O-D Pair Distance
Vehicle Category
Car LCV Bus_Truck MAV
External West Surat 33 0.48 0.63 0.37 0.34
External West Navsari 97 0.16 0.05 0.19 0.13
External West Valsad 159 0.07 0.01 0.14 0.07
Bharuch Bharuch 0 0 0 0 0
Bharuch Surat 33 0.48 0.63 0.37 0.34
Bharuch Navsari 97 0.16 0.05 0.19 0.13
Bharuch Valsad 159 0.07 0.01 0.14 0.07
Surat Surat 0 0 0 0 0
Surat Navsari 64 0.17 0.03 0.29 0.22
Surat Valsad 126 0.08 0 0.21 0.13
External East External South 99 0.77 0.92 0.75 0.78
External East
External South
East
89 0.79 0.86 0.82 0.87
External East Vadodara 161 0.76 0.85 0.73 0.77
External East Bharuch 70 0.66 0.8 0.61 0.65
External East Navsari 27 0.09 0.01 0.13 0.07
87. CONTD.87
O-D Pair Distance
Vehicle Category
Car LCV Bus_Truck MAV
External East Valsad 89 0.04 0 0.09 0.04
Navsari Navsari 0 0 0 0 0
Navsari Valsad 62 0.02 0 0.04 0.02
External South East External South 10 0.47 0.66 0.39 0.35
External South East Vadodara 250 0.92 0.97 0.93 0.96
External South East Bharuch 159 0.88 0.96 0.88 0.93
External South East Surat 126 0.21 0.03 0.33 0.27
External South East Navsari 62 0.67 0.76 0.68 0.72
External South East Valsad 0 0 0 0 0
Valsad Valsad 0 0 0 0 0
External South Vadodara 260 0.92 0.99 0.89 0.93
External South Bharuch 169 0.87 0.98 0.82 0.87
External South Surat 136 0.2 0.06 0.24 0.16
External South Navsari 72 0.66 0.85 0.58 0.58
External South Valsad 10 0.74 0.95 0.6 0.62
88. LOS THRESHOLDS88
LOS Thresholds for Six Lane Divided
Interurban Expressway Segments
LOS V/C PCU/day Threshold
A <0.25 <39800
58200 @ LOS-B:
Suggested
threshold flow for
conversion from
six lane to eight
lane divided road
to ensure
enhanced safety in
traffic operations.
B 0.26-0.5
39801-
76500
C 0.51-0.75
76501-
114800
D 0.76-0.93
114801-
142300
E 0.94-1
142301-
153000
F >1 >153000
LOS Thresholds for Eight Lane Divided
Urban Expressway Segments
LOS V/C PCU/day Threshold
A <0.25 <47600
69600 @ LOS-B:
Suggested
threshold flow for
conversion from
six lane to eight
lane divided road
to ensure
enhanced safety in
traffic operations.
B 0.26-0.5
47601-
91500
C
0.51-
0.75
91501-
137300
D
0.76-
0.93
137301-
170200
E 0.94-1
170201-
183000
F >1 >183000
89. VOLUME TO CAPACITY ANALYSIS89
0.0
0.5
1.0
1.5
2.0
2018 2023 2028 2033
V/C
Year
V/C Trend for NH-48
Karjan
Narmada
Choryasi
Boriach
Bhagwada
LOS B
LOS C
LOS F
90. CONTD.90
0.0
0.5
1.0
1.5
2.0
2018 2022 2026 2030 2034
V/C
Year
V/C Trend for 6-Lane VME
1
2
3
4
5
6
7
LOS B
LOS C
LOS F
0.0
0.5
1.0
1.5
2.0
2018 2022 2026 2030 2034
V/C
Year
V/C Trend for 8-Lane VME
1
2
3
4
5
6
7
LOS B
LOS C
LOS F
91. RESULTS AND DISCUSSIONS
The employment multiplier for region is 1.86. i.e. E = 1.86 EB.. Employment
multiplier of our districts in study regions i.e. Vadodara, Bharuch, Surat,
Navsari and Valsad are 1.54, 1.53, 2.42, 1.73 and 1.75 respectively with
1.8 value for Gujarat State.
The actual growth rate of investment and employment in region are 29%
and 21% respectively.
The traffic of NH-48 is forecasted using aggregate and disaggregate
models.
Aggregate models are developed with annual economic data
that are
Employment and investment data of region,
Employments models are performing better
91
92. CONTD.
Vehicle registration data of Gujarat, and
Vehlice registration data is able to explain traffic well
GDPIND, GSDPGUJ and GSDPMH data.
GSDPGUJ model is performing well
Disaggregate models are developed using
Regression Analysis
Bus_Truck and MAV models are not able to explain data
Moving Average with Classical Decomposition
Bus_Truck and Car models have high MAE and MAP values
ARIMA Models
Most of the models have seasonal Moving average component after
seasonal decomposition.
92
93. CONTD.
V/C Analysis
RegV, RegTV and GSDPGUJ models are showing smooth growth trend
while others are shooting up after 2019.
The highway sections have already reached capacity and the traffic is
except to grow twice of capacity by 2035.
Diversion Analysis
The diversion proportion through logit model show that mostly E-E
(through) traffic, I-E and E-I traffic will shift to proposed facility (VME).
The V/C analysis show that NH-48 and VME will operate in LOS ‘C’,
considering VME as 6-lane divided while VME can also be in LOS ‘B’
for 8-lane divided.
93
94. FUTURE SCOPE OF WORK
Change in land use pattern which is responsible for
development traffic for NH during the horizon year is likely to
be considered.
Freight demand modeling is to be included to calculate the
growth rate of freight vehicles for exclusive freight corridors.
94
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