Estimating Commute Trips
description
Transcript of Estimating Commute Trips
![Page 1: Estimating Commute Trips](https://reader035.fdocuments.in/reader035/viewer/2022062222/56815d7c550346895dcb87b3/html5/thumbnails/1.jpg)
Estimating Commute TripsThe Evergreen State College
Office of Institutional Research and Assessment
![Page 2: Estimating Commute Trips](https://reader035.fdocuments.in/reader035/viewer/2022062222/56815d7c550346895dcb87b3/html5/thumbnails/2.jpg)
Reason for study
• Parking Office wanted information on student and employee commuting patterns as part of the Commute Trip Reduction Program.
• Institutional Research wanted to support the effort and experiment with geocoding addresses for other research.
![Page 3: Estimating Commute Trips](https://reader035.fdocuments.in/reader035/viewer/2022062222/56815d7c550346895dcb87b3/html5/thumbnails/3.jpg)
![Page 4: Estimating Commute Trips](https://reader035.fdocuments.in/reader035/viewer/2022062222/56815d7c550346895dcb87b3/html5/thumbnails/4.jpg)
MethodologyGeocoding - addresses were mapped as points relative to a reference file (Census Tiger files)
Student mailing addresses from Fall 2004 snapshot were used.
If addresses were out-of-state, PO Boxes, billing, and/or parent addresses then attempts were made to identify other address.
Employee addresses from Spring 2005 were used. PO Boxes were excluded.
The records from Commute Trip Survey reviewed to confirm addresses or provide more accurate commuting addresses.
Total of 92% of student and employee addresses were geocoded.
![Page 5: Estimating Commute Trips](https://reader035.fdocuments.in/reader035/viewer/2022062222/56815d7c550346895dcb87b3/html5/thumbnails/5.jpg)
![Page 6: Estimating Commute Trips](https://reader035.fdocuments.in/reader035/viewer/2022062222/56815d7c550346895dcb87b3/html5/thumbnails/6.jpg)
![Page 7: Estimating Commute Trips](https://reader035.fdocuments.in/reader035/viewer/2022062222/56815d7c550346895dcb87b3/html5/thumbnails/7.jpg)
Students’ Commute Distances Compared to Employees’“The Donut Analysis”
Distance from The Evergreen State College, Olympia campus
27% (N =1019)
12% (N=447)
21% (N=776)
9% (N=352)
11% (N=405)
8% (N=317)
8% (N=282)
4% (N=135)
4% (N = 29)
19% (N=151)
28% (N=221)
14% (N=109)
20% (N=161)
10% (N=80)
4% (N=35)
1% (N=5)
0% 5% 10% 15% 20% 25% 30%
Within 1 mile of Evergreen
More than 1 mile to 3 miles
More than 3 miles to 5 miles
More than 5 miles to 7 miles
More than 7 miles to 15 miles
More than 15 miles to 30 miles
More than 30 miles to 60 miles
More than 60 miles
Student AddressesEmployee Addresses
![Page 8: Estimating Commute Trips](https://reader035.fdocuments.in/reader035/viewer/2022062222/56815d7c550346895dcb87b3/html5/thumbnails/8.jpg)
Students’ Commute Distances Compared to Employees’
Distance from The Evergreen State College, Olympia Campus
27% (N=1,019)
39% (N=1,466)
60% (N=2,242)
69% (N=2,594)
80% (N=2,999)
89% (N=3,316)
96% (N=3,598)
4% (N=135)
4% (N=29)
23% (N=180)
51% (N=401)
64% (N=510)
85% (N=671)
95% (N=751)
99% (N=786)
1% (N=5)
0% 20% 40% 60% 80% 100% 120%
Within 1 mile
Within 3 miles
Within 5 miles
Within 7 miles
Within 15 miles
Within 30 miles
Within 60 miles
Outside of 60 miles
Student AddressesEmployee Addresses
![Page 9: Estimating Commute Trips](https://reader035.fdocuments.in/reader035/viewer/2022062222/56815d7c550346895dcb87b3/html5/thumbnails/9.jpg)
Observations• Greatest percentages of students live within 1 mile of
Olympia campus (27%, N=1,019)
• Greatest percentage of employees between 3 to 5 miles of Olympia campus (28%, N=221)
• 39% of students live within 3 miles of the Olympia campus compared to 23% of employees.
• The greater percentage of student addresses outside of 60 miles (4%) may reflect both students independent learning opportunities and some out-of-date addresses.
![Page 10: Estimating Commute Trips](https://reader035.fdocuments.in/reader035/viewer/2022062222/56815d7c550346895dcb87b3/html5/thumbnails/10.jpg)
Other ways to view the data…• Instead of addresses as points or rings
showing distance choropleth maps can be used.
•The map on the next page was normalized, the map shows concentrations of students and employees per 100 people in each census tract. This controls for differences in the population of each census tract.
![Page 11: Estimating Commute Trips](https://reader035.fdocuments.in/reader035/viewer/2022062222/56815d7c550346895dcb87b3/html5/thumbnails/11.jpg)
![Page 12: Estimating Commute Trips](https://reader035.fdocuments.in/reader035/viewer/2022062222/56815d7c550346895dcb87b3/html5/thumbnails/12.jpg)
![Page 13: Estimating Commute Trips](https://reader035.fdocuments.in/reader035/viewer/2022062222/56815d7c550346895dcb87b3/html5/thumbnails/13.jpg)
Lessons Learned• Geocoding is time consuming and requires close
auditing of geocoded addresses, doing some matches by hand, and making edits to the reference file.
• These maps are estimates; mailing addresses are a best guess as to where people are commuting from.
![Page 14: Estimating Commute Trips](https://reader035.fdocuments.in/reader035/viewer/2022062222/56815d7c550346895dcb87b3/html5/thumbnails/14.jpg)
Other Analyses
• Part-time and full-time attributes in the database, so that differences in commute patterns could be analyzed.
• With a complete bus route map, an analysis of the number of students and employees that live within walking distance to a bus stop.
• Find concentrations to suggest neighborhood carpools or other alternatives.
![Page 15: Estimating Commute Trips](https://reader035.fdocuments.in/reader035/viewer/2022062222/56815d7c550346895dcb87b3/html5/thumbnails/15.jpg)
Other Institutional Research Maps
• Student County of Origin• Student State of Origin• Transfer Institutions
www.evergreen.edu/institutionalresearch