Speed Bump Safety - PowerPoint PPT Presentation

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Speed Bump Safety

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Speed Bump Safety. Kyle Hays. Kris Olinger. Michael Young. Karen Vann. Objective. Evaluate safety benefits of speed bumps that have been in place for over 5 years. ... – PowerPoint PPT presentation

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Title: Speed Bump Safety


1
Speed Bump Safety
  • Kyle Hays
  • Kris Olinger
  • Michael Young
  • Karen Vann

2
Objective
  • Evaluate safety benefits of speed bumps that have
    been in place for over 5 years.

3
Outline of Presentation
  • Types of Speed Bumps
  • Data Collection/Methodology
  • Results data comparison
  • Negative Impacts Environmental and Emergency
    Services
  • Limitations further studies

4
Types of Speed Bumps
  • Median - 1,000-1,500 each
  • 14-foot residential streets w/25 mph limit
  • 22-foot neighborhood collector w/30 mph limit
    or a fire response route

14 or 22 foot wide
5
Types Costs
  • Offset (Split) - 6,000-6,500 each

6
Methodology
  • Reviewed existing reports
  • existing speed bump speed and volumes
  • accident history
  • Selected previously reviewed streets to perform a
    current speed study
  • Compared current data with existing
  • Researched other factors
  • emergency vehicles
  • environmental impacts

7
Data Collection
  • Existing Studies
  • Kittleson Peer Review 1998
  • PDOT Traffic Calming Program website
  • Accident History 2002
  • Emergency response information
  • Field work

8
Site Photos
  • Speed Bump Street

Parallel Control Street
9
Data Collection
10
Speed Data for SE 58th
11
Parallel Speed Vs. Volume
12
Crash Data Comparison
13
Public Perceptions
  • People in favor of traffic slowing devices on
    parallel street
  • Josh Hatch, resident of SE 62nd Ave

14
Negative Impacts Fire Trucks
  • Fire trucks
  • can lose up
  • to 9 seconds
  • per speed
  • bump
  • Wear and
  • tear on trucks

15
Negative Impacts Fire Trucks - Solutions
  • Emergency Response Routes
  • Major vs. minor
  • Creative speed bump varieties
  • Split speed bumps

16
Environmental Impacts
  • Noise
  • Overall decrease due to decrease in traffic
    volumes speeds
  • Isolated increase especially for delivery-type
    trucks buses
  • Pollution
  • Fuel consumptions emissions slightly increase
    from decelerating and accelerating

17
Conclusions
  • Speed bump street speeds and volumes were lower
    than on parallel streets
  • Future Analysis
  • More data, particularly during the peak hour
    (4-6 PM)
  • More crash data (speed bumps installed less
    recently)
  • Standardized Procedures
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