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matrex Management & Transportation Experts Matrex Oy Teollisuuskatu 33, 00510 Helsinki Puh. (09) 229 33 10 Fax (09) 229 33 150 Email [email protected]
Measuring the quality of public transit system
Tapani Särkkä
Petri Blomqvist
Ville Koskinen
matrex Management & Transportation Experts Matrex Oy Teollisuuskatu 33, 00510 Helsinki Puh. (09) 229 33 10 Fax (09) 229 33 150 Email [email protected]
Background
• Projects for Helsinki City Transport and in a DART-project
• More recently, a project for Ministry of Transportation and Communication– To measure the planned quality of public
transit system
• As a result, a quality measurement system has been developed
matrex Management & Transportation Experts Matrex Oy Teollisuuskatu 33, 00510 Helsinki Puh. (09) 229 33 10 Fax (09) 229 33 150 Email [email protected]
What is it and what it does?
• An EMME/2-model
• Basis on deterministic assignment
• Generates virtual passengers from each zone to each zone
• Analysis of two way trips possible
matrex Management & Transportation Experts Matrex Oy Teollisuuskatu 33, 00510 Helsinki Puh. (09) 229 33 10 Fax (09) 229 33 150 Email [email protected]
Example - Commuters
• Arrival to the job at 8:00-9:00 am, departure 8.5±0.5 hours later
• Search for optimal paths for the virtual passengers by deterministic assignment– The arrival time is varied 8:00, 8:01, ... , 9:00– When a new one-way connection is found,
search for an optimal path for return trip
• Different types of two-way trips can be analyzed
matrex Management & Transportation Experts Matrex Oy Teollisuuskatu 33, 00510 Helsinki Puh. (09) 229 33 10 Fax (09) 229 33 150 Email [email protected]
The quality indices of supply
• For each OD-pair the average of – Total transit times and its components– Transit speed in km/h or in relation to the auto
speed – Number of boardings– Headway
• Number of transit connections between the OD-pairs
matrex Management & Transportation Experts Matrex Oy Teollisuuskatu 33, 00510 Helsinki Puh. (09) 229 33 10 Fax (09) 229 33 150 Email [email protected]
Indices of supply vs. demand
• For each O/D weighted average of the indices– Weighting by total demand or transit demand
• Visualization of the OD-pairs that have low values of the index value but high demand
• ENIF for visualizations
matrex Management & Transportation Experts Matrex Oy Teollisuuskatu 33, 00510 Helsinki Puh. (09) 229 33 10 Fax (09) 229 33 150 Email [email protected]
Connections to a destination
matrex Management & Transportation Experts Matrex Oy Teollisuuskatu 33, 00510 Helsinki Puh. (09) 229 33 10 Fax (09) 229 33 150 Email [email protected]
Average speed by destinations
matrex Management & Transportation Experts Matrex Oy Teollisuuskatu 33, 00510 Helsinki Puh. (09) 229 33 10 Fax (09) 229 33 150 Email [email protected]
No connections (OD-pairs)
matrex Management & Transportation Experts Matrex Oy Teollisuuskatu 33, 00510 Helsinki Puh. (09) 229 33 10 Fax (09) 229 33 150 Email [email protected]
Lowest traveling speed
matrex Management & Transportation Experts Matrex Oy Teollisuuskatu 33, 00510 Helsinki Puh. (09) 229 33 10 Fax (09) 229 33 150 Email [email protected]
Averaging can be dangerous!
• Two example schedules:
• The std or minimum of the index
Example 1 Example 2
08:05 08:05
08:06 08:20
08:35 08:35
08:36… E[hdw]=15 min 08:50… E[hdw]=15 min
Example 1 Example 2
std=14 min; max=29 min std=0 min; max=15 min
matrex Management & Transportation Experts Matrex Oy Teollisuuskatu 33, 00510 Helsinki Puh. (09) 229 33 10 Fax (09) 229 33 150 Email [email protected]
Tulosten visualisointi
matrex Management & Transportation Experts Matrex Oy Teollisuuskatu 33, 00510 Helsinki Puh. (09) 229 33 10 Fax (09) 229 33 150 Email [email protected]
Transit speeds (km/h)
matrex Management & Transportation Experts Matrex Oy Teollisuuskatu 33, 00510 Helsinki Puh. (09) 229 33 10 Fax (09) 229 33 150 Email [email protected]
Number of boardings
matrex Management & Transportation Experts Matrex Oy Teollisuuskatu 33, 00510 Helsinki Puh. (09) 229 33 10 Fax (09) 229 33 150 Email [email protected]
Walking times (min)
matrex Management & Transportation Experts Matrex Oy Teollisuuskatu 33, 00510 Helsinki Puh. (09) 229 33 10 Fax (09) 229 33 150 Email [email protected]
Uses of the measurement system
• Analysis of planned quality of transit system • Monitoring it when the supply and the demand
change• ENIF can be configured as an interactive
decision support system that is easy to use• The demand matrix makes the measurement
system very useful• Cost/benefit analyses• …