How does dTIMS work?
Contents
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Strategies
Cost Benefit
Optimization methods
Selection of Strategies
Analysis Procedure
Generating Treatment Strategies
Cost A
Strategy A
Road Condition
Strategy B
Strategy C
Benefit A
Cost B
Benefit B
Cost C
Benefit C
Cost Benefit

Object Function
– Maximize Area under Curve
– Minimize Total Transportation Cost
– Maximize Saving in VOC
Composite Index
Area Under Curve (AUC)
Benefit
Strategy
Salvage
Do-nothing
Analysis Period
Time
Minimize Total Transportation Cost
(TTC)
Optimum Maintenance
COSTS
Total Transport Costs
Road User Costs
Maintenance Costs
Construction Costs
MAINTENANCE LEVEL
Maximize Saving in VOC
VOC
Benefit
Do-nothing
Strategy
Analysis Period
Time
Objective Function To Use
Objective Function
Objective Function
Area Under Curve
Const. Budget Poor Roads
Total Transportation Costs
Med. Budget Poor Roads
Vehicle Operating Costs
Adeq. Funding Good Roads
Selection of Strategies
(Efficiency Frontiers)
A

3 4
2
B
5
IBC

Costs

2 
4
3
Costs

5
Analysis Procedure
A


2

3
4
C 
B


5
IBC



Costs
Strategy
Do Nothing
2
3
4
5
2


4
3

5
3
2
-----
B
------
Seal $ B
Seal $ B
Ovl
$B
Recon $ B
----Seal $ B
Seal $ B
Ovl
$B
Recon $ B

5

Costs
A
4
Costs
C
----Seal $ B
Seal $ B
Ovl
$B
Recon $ B
Running dTIMS Analysis
Outputs
Performance
Index
Performance
Modeling
Composite
Index
Expressions
And
Filters
Resets
Triggers
Costs
Optimize
Treatments
Generate
Strategies
Steps in Repetitive Analysis
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Create Source File from Database
Update Treatment Costs (Interface)
Change Analysis Period
Generate Strategies
Optimization
Adjust Program
Generate Reports
Analysis set
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Sections to include in an Analysis
May be all roads or a sub-set
e.g. for a district only
defined by a Group Expression
System Parameters
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Modelling parameters to all analyses
Analysis period e.g. 1995 - 2015
Discount Rate e.g. 12%
Currency Unit e.g. Rps.
Treatment Strategies
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Defined by the type and timing of a Rehab
Treatment e.g.
Reconstruct in 1997; or
Overlay in 1998
Strategy includes the Rehab and the later
Periodic Treatments plus Routine
“Do-nothing” is also a Strategy - the base
case
Optimization
Budget Scenarios

1
2
3
4
Reporting with dTIMS
Views in dTIMS
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Inventory Data Base
Budget Scenario Summary
Strategy List
Condition Distribution
Analysis Set Summary
Maintenance Program
Performance Graphs (6)
Exporting Data
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Copy Paste
Table Export
Exporting Graphs
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Formatting
Exporting
Example Bar Chart
Condition Distribution By Length
V. Poor
Fair
Poor
Good
Excellent
Example Influence:Influence of
Funding Scenarios
Condition (NAASRA)
200
150
100
50
0
1999
2001
2003
2005
2007
2009
Year
Very Low Budget
Low Budget
High Budget
Very High Budget
Medium Budget
2011
Example Influence of Funding
Scenarios
Backlog Length (Km)
1200
1000
800
600
400
200
0
1999
2001
2003
2005
2007
2009
Year
Very Low Budget
Low Budget
High Budget
Very High Budget
Medium Budget
2011
Example Distribution of Treatment
Types
Length (km)
800
700
600
500
400
300
200
100
0
1999
2000
2001
2002
Asphalt Reconstruction
Asphalt Overlay
Year
Mill and Replace
ST Reconstruction
Resurface
Routine Maintenance
Example Construction Program
ROAD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
FROM
TO
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
HIRARCHY
URBAN
URBAN
URBAN
URBAN
URBAN
M
URBAN
URBAN
URBAN
URBAN
M
URBAN
M
M
URBAN
URBAN
URBAN
URBAN
URBAN
URBAN
TREAT
RTN
SRSS
RTN
RTN
SSRA
RTN
RTN
RTN
SSOL
RTN
RTN
SRSS
SMOL
RTN
SRSL
1999
COSTS
TREAT
7,510 SSRL
21,000
7,510 SSOA
RTN
7,510 RTN
115,000
7,510 SRSL
7,510
7,510 RTN
140,600
7,510 RTN
7,510 RTN
21,000
86,475
7,510
RTN
SRSS
451,665
2000
COSTS
TREAT
2001
COSTS
22,000
198,514
7,510
7,510 SMMA
266,250
RTN
7,510 RTN
RTN
7,510 RTN
RTN
7,510 SMOL
RTN
RTN
7,510 RTN
21,000
552,824
TREAT
SRSS
RTN
RTN
206,350 RTN
SMMA
SRSS
7,510 RTN
7,510 RTN
7,510
7,510
7,510
86,475
7,510
SRSL
RTN
RTN
SRSL
SRSL
7,510
7,510 RTN
RTN
352,905
2002
COSTS
TREAT
2003
COSTS
21,000 RTN
7,510
7,510 RTN
7,510
7,510 RTN
206,350
21,000
7,510 RTN
7,510
SMOA
22,000 RTN
SMRA
7,510 RTN
7,510
22,000 RTN
22,000 SRSS
RTN
7,510 SRSS
7,510
7,510
381,940
7,510
7,510
83,500
7,510
206,350
7,510
7,510
21,000
7,510
21,000
391,930