How to build and develop a metric for transportation projects. Parameters to include and structure.

1. ElDessouki TTE 332 Transportation Engineering II S2021
Transportation
Projects Metrics
147

2. Project Metrics?
• Project Metrics are measurements for the project
progress/performance based on the project goals and critical factors
for success.
• Classification of Project Metrics:Value Based/ Benefits Based
• Project Metrics: Used to measure project success.
Project Metrics Parameters Key Attributes:
1. Relevant to Project Objectives
2. QuantitativeValues & Supported with Real Data
3. Accurately Measurable
4. Can be Normalized
ElDessouki
TTE 332 Transportation Engineering II S2021 148

3. DevelopingTransportation Projects’ Metrics
Example 1:
Identify parameters needed to develop performance metric for aTraffic Safety
Project.
Answer:
Number of accidents
Number of fatalities due to accidents
Number of fatalAccidents/Total Accidents  Severity of accidents
Number of fatalities/capita  good normalization
Number of fatalities/ miles traveled  Better normalization
ElDessouki
TTE 332 Transportation Engineering II S2021 149

4. DevelopingTransportation Projects’ Metrics
Example 2:
Identify parameters needed to Develop metric for Speed Enforcement Project.
Answer:
Before and after
% Reduction in Average Speed
Reduction in the 85th % speed
Reduction in number of speed violators Divide by volume
 % of violators
ElDessouki
TTE 332 Transportation Engineering II S2021 150

5. DevelopingTransportation Projects’ Metrics
Example 3:
Identify parameters needed to Develop metric forTransportation Network
Improvement Project
Answer:
Change in AverageTravelTime on network links  can be measured
Change in OD travel time  weighted average change in OD travel time
Total travel time on the network  Estimation  error
For normalization:
Project cost 
ElDessouki
TTE 332 Transportation Engineering II S2021 151

6. Project Metrics: Structure
• Project Metrics Structure is basically the mathematical formula
that link the key parameters to form the metric.
Project Metrics Structure Key Attributes:
1. Reflects relationships between performance and parameters
2. Logical and easy to understand
3. Portable: i.e. not data specific or site specific
ElDessouki
TTE 332 Transportation Engineering II S2021 152

7. DevelopingTransportation Projects’ Metrics
Example 4:
Develop different structures for a performance metric for aTraffic Safety
Project.
Answer:
ElDessouki
TTE 332 Transportation Engineering II S2021 153

8. DevelopingTransportation Projects’ Metrics
Example 5:
Develop different structures for a performance metric for Speed Enforcement
Project.
Answer:
ElDessouki
TTE 332 Transportation Engineering II S2021 154

9. DevelopingTransportation Projects’ Metrics
Example 6:
Develop different structures for a performance metric forTransportation
Network Improvement Project
Answer:
ElDessouki
TTE 332 Transportation Engineering II S2021 155

10. Project Metrics:Validation
Assessment andValidation for Project Metrics:
1. Acceptability survey by Stakeholders & Decision Makers
2. Concurrency in estimations: different estimators will result in
similar values.
3. Portability test: try to apply it in different site and evaluate the
results. (Case: HCM performance measures: Example: method
for delay study at traffic signals)
ElDessouki
TTE 332 Transportation Engineering II S2021 156

11. End of Module 5
ElDessouki
TTE 332 Transportation Engineering II S2021 157