April 9, 2008.
California Office of Traffic Safety Summit
San Francisco, CA.
May 19, 2009
University of Minnesota Center for Transportation Studies
Bloomington, MN
June 23, 2009
Driving Assessment 2009
Big Sky, Montana
June 26, 2009
PRI World Congress
Rotterdam, The Netherlands
June 27, 2009
Day of Architecture
Utrecht, The Netherlands
July 13, 2009
Association of Transportation Safety Information Professionals (ATSIP)
Phoenix, AZ.
August 12-14
Texas Department of Transportation “Save a Life Summit”
San Antonio, Texas
September 2, 2009
Governors Highway Safety Association Annual Meeting
Savannah, Georgia
September 11, 2009
Oregon Transportation Summit
Portland, Oregon
October 8
Honda R&D Americas
Raymond, Ohio
October 10-11
INFORMS Roundtable
San Diego, CA
October 21, 2009
California State University-San Bernardino, Leonard Transportation Center
San Bernardino, CA
November 5
Southern New England Planning Association Planning Conference
Uncasville, Connecticut
January 6
Texas Transportation Forum
Austin, TX
January 19
Yale University
(with Donald Shoup; details to come)
Monday, February 22
Yale University School of Architecture
Eero Saarinen Lecture
Friday, March 19
University of Delaware
Delaware Center for Transportation
April 5-7
University of Utah
Salt Lake City
McMurrin Lectureship
April 19
International Bridge, Tunnel and Turnpike Association (Organization Management Workshop)
Austin, Texas
Monday, April 26
Edmonton Traffic Safety Conference
Edmonton, Canada
Monday, June 7
Canadian Association of Road Safety Professionals
Niagara Falls, Ontario
Wednesday, July 6
Fondo de Prevención Vial
Bogotá, Colombia
Tuesday, August 31
Royal Automobile Club
Perth, Australia
Wednesday, September 1
Australasian Road Safety Conference
Canberra, Australia
Wednesday, September 22
Wisconsin Department of Transportation’s
Traffic Incident Management Enhancement Program
Statewide Conference
Wisconsin Dells, WI
Wednesday, October 20
Rutgers University
Center for Advanced Infrastructure and Transportation
Piscataway, NJ
Tuesday, March 8, 2011
Ontario Injury Prevention Resource Centre
Injury Prevention Forum
Toronto
Monday, May 2
Idaho Public Driver Education Conference
Boise, Idaho
Tuesday, June 2, 2011
California Association of Cities
Costa Mesa, California
Sunday, August 21, 2011
American Association of Motor Vehicle Administrators
Milwaukee, Wisconsin
Wednesday, October 26, 2011
Attitudes: Iniciativa Social de Audi
Madrid, Spain
April 16, 2012
Institute for Sensible Transport Seminar
Gardens Theatre, QUT
Brisbane, Australia
April 17, 2012
Institute for Sensible Transport Seminar
Centennial Plaza, Sydney
Sydney, Australia
April 19, 2012
Institute for Sensible Transport Seminar
Melbourne Town Hall
Melbourne, Australia
January 30, 2013
University of Minnesota City Engineers Association Meeting
Minneapolis, MN
January 31, 2013
Metropolis and Mobile Life
School of Architecture, University of Toronto
February 22, 2013
ISL Engineering
Edmonton, Canada
March 1, 2013
Australian Road Summit
Melbourne, Australia
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| 
August 27th, 2009 at 6:12 pm
Four-way stops are also cyclist harassment devices, resulting in significant increase in effort due to starting and stopping. Which is why you won’t find them in The Netherlands. And why Toronto is looking at replacing many of them with “yield” signs to show right-of-way.
The most effective speed enforcement is photo radar. 100% of offenders get charged.
August 27th, 2009 at 7:15 pm
Traffic calming circles, per definitions around here, maintain the existing right-of-way controls. So if you have a 4-leg intersection with a 2-way stop on the minor street: you’d have what resembles a roundabout, except the mainline has less deflection & also dominant right-of-way. The minor street continues to be controlled, though its stop signs would likely be replaced by yield signs.
The issue I have with traffic calming circles is expectancy: in Maryland we have plenty of roundabouts, so putting in a traffic calming circle may result in mainline motorists stopping unexpectedly; or left-turns across the mainline may not know that they are to yield to opposing mainline traffic.
Here’s a standard from the Virginia DOT:
http://www.fairfaxcounty.gov/dpwes/publications/pfm/plates/42m_7.pdf
August 27th, 2009 at 8:56 pm
I have two traffic circles near my house. I have yet to see any driver (other than myself) follow our local traffic codes for using them. People in my community also fail to use 4-way stops and weave-lanes correctly, and short-cut down the wrong side of divided roads to get into the laneways behind their houses, so this isn’t much of a shock. Cycling in my neighbourhood is an exciting hobby.
I think complaints about road features are more often linked to a “I don’t know how to use it and I don’t want people laughing at me when I use it incorrectly” thought process than any other reason. Drivers don’t want to look stupid (but they also don’t want to look up the relevant traffic code, either). That level of laziness and ignorance behind the wheel of a car is a frightening prospect.
August 28th, 2009 at 10:02 am
Is slowing traffic a good idea?
August 28th, 2009 at 5:46 pm
Aaron asked:
“Is slowing traffic a good idea?”
Kevin’s answer:
It depends. A lot of bicycle traffic needs to be speeded up by doing things like eliminating four-way stops. Bicycle traffic should be going at 20-30 km/hr. At the same time, a lot of car traffic needs to be slowed down so that it is also going at 20-30 km/hr.
It is safest when everyone is going at about the same speed. Also, cars going less than 30 km/hr kill a lot less people when they hit them.
This is why I advocate 30 km/hr car speed limits strictly enforced with photo-radar and fines high enough to pose a strong deterrent.