Disclaimer. I have NO answers!Only YOU have the answer!. Poor Operations . Increased Crash FrequencyIncreased Travel Times?.Economic ImpactsTraffic Diversion to Side StreetsCitizen Complaints Non-Compliance Viscous Circle of Congestion. Better Operations. Delay would decrease by 15 to 40%
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1. Investing in Traffic Signals? Paul R. Olson, P.E., PTOE
3. Poor Operations Increased Crash Frequency
Increased Travel Times….
Traffic Diversion to Side Streets
Viscous Circle of Congestion
4. Better Operations Delay would decrease by 15 to 40%
Travel time would reduce up to 25%
Emissions would reduce up to 22%
Fuel use would reduce up to 10%
B/C ratios up to 40:1
5. What does this all mean? How do these numbers relate?
30 minute travel time => 7 min saved
20 MPG => 22 MPG
Do you individually measure these?
Can drivers recognize these savings?
6. Can you believe this? B/C Ratios of 100+/1
Fuel savings of 847,950 gallons
Stops reduced by 36,085,590
Delay reduced by 745,490
Reduced operations costs by $13,376,556
7. However…… We can’t make cars disappear
Traffic volumes will still increase (maybe)
We can’t fix poor land use decisions
Our duty to achieve maximum benefit?
We may be overselling and not delivering.
8. Investments in Signals How Much is needed?
Where will the $$ come from?
Do you know if the investment worked?
Will public see results?
Will more $$ solve the problem?
How do we define good operations?
9. Audience Participation Required! Don’t be shy.
Your input is valid.
Your input is important.
10. How Much $$? How much are you currently spending per intersection?
Recent survey data
11. How many people? How many engineers per signal
How many techs per signal
What is the level of expertise
How much time is really spent on operating the system?
12. Recent Data
13. What is the Key? Is big spender best operator?
Is spend thrift worst operator?
Is the number of people key?
Is the spread Hi/Low important?
Where would you fit?
How do we explain the data?
How we translate into an action plan?
14. Questions, Questions, Questions How do we know how much to invest?
How do we decide where to invest?
Do you know if that investment accomplished its intended goal?
Is your program linked to system size?
Shouldn’t we attempt to measure this?
15. Performance Measures What is your current #1 measure?
What do you really want to know?
What does the public really want?
Do we have a goal at all?
What is your plan for the future?
16. Complications We don’t really have a plan
We don’t know what to measure
We haven’t been successful at telling our tale.
NTOC Report Card
1990’s GAO and other reports
No real vocal constituency
17. What do we know? Investing in signal operations is good.
We can see the results.
We do have a few measures.
We try to promote this.
18. We have limitations We are not English Majors
We are not Poly Sci Majors
We are not PR experts
We ARE Engineers and Technicians
19. We Should Invest In Developing a long range program
Long term system monitoring
Long term data archiving
PR to sell the program
People to make the systems work
20. Conclusion We have a lot of work to do
We may not know where to start
We don’t even have a plan
Not easy tell how much $$ is needed
You can’t change this alone