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

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

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

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

Research (types vs speeds) Questionnaire Drivers Pedestrians Passengers

Research (types vs speeds)

Research (types vs speeds)

Research (types vs speeds)

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

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

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

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

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

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

Overview Descriptive Statistics ANOVA Post Hoc Tukey test

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!

Criteria (points) Criteria Coefficient 1. Distance to risk 100 м 100-200 м 200-400 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

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

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 100-200 м 200 м 6.2. Traffic lights presence 3 50 % 30-50 % 30 % 6.3. Participation of the speeding vehicles Маx 17 points

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