1. Ex. 2 – Speed bumps issue City residents ask for speed bumps
City government ordered a project
Decision maker does not know which SB height
Decision maker does not know which SB type
Decision maker does not know to put SB or not
City residents ask for speed bumps

2. Ex. 2 – Project Steps Answers and Criteria Transfer of knowledge
Research
Legislative in Serbia
Transfer of knowledge

3. Transfer of knowledge ITE California experience Washington experience
New York experience
Columbia experience
Italian experience
...

4. Legislative in Serbia Road Traffic Safety Law Rule Book
School zones requires technical resources (TR)...
TR decrease (limit) the speed...
TR are speed bumps, humps, lumps, vibroacoustic stripes...
TR are followed by vertical signalization...
TR on local, residential street, exceptionally on state roads,
Project is needed before realization and installation,
Other details are defined in Rule Book
Rule Book

5. Research (types vs speeds)
Questionnaire
Drivers
Pedestrians
Passengers

6. Research (types vs speeds)

7. Research (types vs speeds)

8. Research (types vs speeds)

9. Research (Particular location 1)
Speeds
Before installation
10 days after
30 days after
Speeds
Approaching speed
First bump
Between bumps
Second bump
Outgoing speed

10. Particular location 1 – 3 cm SB
Speeds
Approaching speed
First bump
Between bumps
Second bump
Outgoing speed

11. Research (Particular location 2)
Speeds
Before installation
10 days after
30 days after
Speeds
Approaching speed
First bump
Between bumps
Second bump
Outgoing speed

12. Particular location 2 – 5 cm SB
Speeds
Approaching speed
First bump
Between bumps
Second bump
Outgoing speed

13. Research (Particular location 3)
Speeds
Before installation
10 days after
30 days after
Speeds
Approaching speed
First bump
Between bumps
Second bump
Outgoing speed

14. Particular location 3 – 7 cm SB
Speeds
Approaching speed
First bump
Between bumps
Second bump
Outgoing speed

15. Overview
Descriptive Statistics
ANOVA
Post Hoc Tukey test

16. Criteria To decrease speed and traffic volume...
Unallowed – State roads, High % of heavy vehicles and busses, Urgent vehicle routes, low visibility locations, bends (less than 90m R), manholes and hydrants...
Modern surface, slope bellow 8%, Straight road at least 100m, Width min 12m...
Visibility of SB at least 60m. At least 25% of surface must be retroreflective...
8m-20m before pedestrian crossing...
Slopes: 6%-3cm, 10%-5cm, 14%-7cm
75% of residents within 100m zone affirmative to SB
More than 55% points for approval!

17. Criteria (points) Criteria Coefficient 1. Distance to risk 100 мм м
1.1.
Kindergarten 7 3 1
1.2.
Elementary school 15 10 5
1.3.
High school 2
1.4.
Playground
1.5.
Sports ground, park,
1.6.
High attraction public object (market, mall, cultural centre...)
Маx 40 points 2.
Structure of the traffic
50%
20-50%
20%
2.1.
Number of pedestrian crosses per minute 6 4 2
Маx 6 points

18. Criteria (points) 3. Traffic accidents 5 3-5 3 3.1.
Number of traffic accidents per year during 5 years period, within 100m оf proposed SB location
PDO 5 3 2
INJURED 7 4
FATALITY 10 8 6
Маx 22 points 4.
Pavements No
One sided
Both sided
4.1.
Pavement presence 6 5 1
1,5 м
1,5-4 м
4 м
4.2.
Distance from the Driveway
Маx 12 points

19. Criteria (points) 5. Straight road 300 м 100-300 м 100 м 5.1.
The length of the straight road between two junctions 3 2 1
Маx 3 points 6.
Оther criteria
High
Mid
Low
6.1.
Critical behaviour in traffic 7 5 1
100 м м
200 м
6.2.
Traffic lights presence 3
50 %
30-50 %
30 %
6.3.
Participation of the speeding vehicles
Маx 17 points

20. Publish!