The document discusses project metrics in transportation engineering, defining them as measurements for project progress based on goals and success factors. It categorizes metrics as value-based or benefits-based and outlines key attributes necessary for effective metrics development, such as relevance, quantifiability, and measurability. Examples illustrate how to identify parameters for metrics in traffic safety, speed enforcement, and network improvement projects, emphasizing the importance of validation and structure in metric development.

1. ElDessouki TTE 332 Transportation Engineering II S2021
Transportation
Projects Metrics
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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
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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
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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
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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 
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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
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7. DevelopingTransportation Projects’ Metrics
Example 4:
Develop different structures for a performance metric for aTraffic Safety
Project.
Answer:
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8. DevelopingTransportation Projects’ Metrics
Example 5:
Develop different structures for a performance metric for Speed Enforcement
Project.
Answer:
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9. DevelopingTransportation Projects’ Metrics
Example 6:
Develop different structures for a performance metric forTransportation
Network Improvement Project
Answer:
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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)
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11. End of Module 5
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