Posts Tagged ‘SEMCOG’

Pedestrian and bicycle safety data analysis

Tuesday, July 21st, 2009

If you spend much time perusing the available safety publications for Michigan, it becomes fairly evident that not much serious effort is put into bicycle and pedestrian analysis.

SEMCOG

One example is SEMCOG’s Crash Facts report where more analysis and pages are devoted to vehicle-deer crashes than either pedestrian crashes or bicycle crashes. This is despite the fact that deer caused just one driver fatality in 2007. There were 65 pedestrian fatalities and 7 bicyclist fatalities in 2007.

For 2008, SEMCOG issued a cheery press release because overall fatalities and crashes were down.

“We are extremely happy to report this continuing decline in traffic crashes in Southeast Michigan,” notes SEMCOG Executive Director Paul Tait.

SEMCOG failed to note that both bicycle and pedestrian fatalities were up. In fact, 18% of all fatalities were pedestrians and bicyclists in 2007. In 2008 that pecentage jumped to 24%.

It seems the “analysis” is simply plugging this year’s numbers into the same old template.

A worthwhile analysis would look at trends within the region and where within the roadway these crashes are occuring.

Do we really need SEMCOG telling us that “bicycle crashes were more common in warmer months…likely due to the difficulties of bicycling in snowy or icy conditions?” They’ve been recycling this same text since 2002.

MDOT

To their credit, MDOT has supported some pedestrian safety studies within the city of Detroit. The city of Detroit’s Traffic Engineering department is has applied for safety funding to make improvements that should reduced pedestrian crashes.

GTSAC

Also, the Governor’s Traffic Safety Advisory Council includes some good analysis within the Michigan Pedestrian and Bicycle Safety Action Plan.

Michigan Pedestrian and Bicycle Safety
Action Plan

OHSP

One interesting analysis from the Office of Highway Safety Planning (OHSP) compares 2007 bicycle crash injury severity for helmeted and non-helmeted riders. We’ve rebuilt their data table as follows:

2007 Bicycle Crashes Total crashes Fatal or serious injury Minor or no injury
With helmet 177 18% 46%
No helmet 795 10% 51%

(Note that it is unreported whether helmets were worn in a little over half of the crashes.)

Among bicyclists wearing helmets in crashes, a significantly higher percentage suffered serious injury or death when compared those without helmets. One would expect the helmeted riders would have a reduced percentage of serious injury or death.

Can this be explained by risk compensation or demographics?

Nonetheless, the OSHP apparently didn’t do much analysis since they’ve cut-and-pasted a quote that’s unsupported by their own data: “Making the use of helmets the single most effective countermeasure available to reduce head injuries and fatalities resulting from bicycle crashes.”

And just to be sure that 2007 wasn’t simply a unique year, we looked at this data back to 2004. For every year, bicyclists wearing helmets in crashes suffered an equal or greater percentage of serious injury or death.

For what it’s worth, there is not a trend towards increased helmet use among those involved in reported bicyclist accidents within Michigan.

Speaking up for Better Bicycling in Metro Detroit

Tuesday, July 15th, 2008

SEMCOG 2035 Transportation PlanCyclists often speculate about why Metro Detroit doesn’t offer safer biking options.

A common culprit is our motor city heritage.

I disagree. I think it’s because we just don’t ask.

In communities where residents have effectively asked for biking options, they got them. Ferndale is a prime example. Troy could be the next one. Both communities surveyed their residents and the number one response was for better biking and walkability.

So how do you ask? Here’s a great option that’s painless and probably somewhat fun.

The Southeast Michigan Council of Governments (SEMCOG) is hosting meetings where “the public is invited to express their opinions regarding the future of Southeast Michigan’s transportation system.”

The meetings are next week at three different locations:

  • Monday, July 21, 2008, SEMCOG offices, 535 Griswold, Suite 300, Detroit; 4-7 p.m. (formal presentations begin at 4:10 p.m. and 5:40 p.m.);
  • Tuesday, July 22, 2008, Southfield Public Library, 26300 Evergreen Rd, Southfield; 4-7 p.m. (formal presentations begin at 4:10 p.m. and 5:40 p.m.); and
  • Wednesday, July 23, 2008, Washtenaw Community College, Morris Lawrence Building, Ann Arbor; 9 a.m.-12 noon (formal presentations begin at 9:10 a.m. and 10:40 a.m.)

Please attend one of these meeting and make your “ASK” for better bicycling facilities in Southeast Michigan.

If you’re unable to attend, you can email your comments to infocenter@semcog.org. You can also take their on-line survey.

Here are additional details from SEMCOG’s press release: (more…)

Bicycle crashes increase for 2007

Thursday, May 15th, 2008

The 2007 bike and pedestrian crash results for the four counties in the MDOT Metro Region have just been added to our on-line database.

In summary, while pedestrian crashes have dropped, bicycle crashes increased by over 13%. As noted by SEMCOG, “traffic crashes involving bicycles are more severe than overall crashes.” In other words, they cause a much higher percentage of injuries. Bikes don’t have bumpers, crash cages, and air bags.

The only “good” news is there were 6 bicycle fatalities this year, down from 13 last year. Still, 23% of all traffic related fatalities in the Metro Region were pedestrians or cyclists.

These numbers only provide more justification for road agencies (like Wayne County and the Road Commission of Oakland County) to begin implementing best practices for safe biking. Agencies and municipalities need to create and implement non-motorized plans on how to reduce these crashes.  Road projects that increase bicyclist safety should be rewarded, not penalized as they can be today in Oakland County.

SEMCOG has released their 2007 Traffic Crash Report. The Michigan State Police should be releasing theirs sometime this month.

Complete Streets Legislation is Introduced

Sunday, March 9th, 2008

Complete Streets logoSenator Tom Harkin from Iowa has introduced the Complete Streets Act of 2008. According to the Senator’s web site, “To reduce accidents, legislation will create ‘Complete Streets’ to keep motorists, transit vehicles, bicyclists, and pedestrians safe.”

Making our streets bike and pedestrian friendly is a win-win for us all. It not only promotes healthier lifestyles, it lowers the amount of traffic congestion that many people deal with every day.

So, what would this bill do for the Detroit area? It would require M-DOT and SEMCOG to adopt policies ensuring “that the safety and convenience of all users of the transportation system shall be accommodated.” That means all new road construction and reconstruction should include bicycle facilities unless very specific justifications can be documented.

Some U.S. cities and states already have Complete Streets policies. In Michigan, only the City of Jackson has done so.

What can you do to help? Make a quick call to Senators Levin (202.224.6221) and Stabenow (202.224.4822) to let them know you support Senator Harkin’s Complete Streets Act of 2008. If no one answers, just leave a message of support, your name, and address. (more…)

Thoughts on Google Maps + bike routes

Wednesday, March 5th, 2008

Google cycling jerseyThere’s a new blog GoogleMapsBikeThere.org that’s leading a petition to get bike directions added to Google Maps. In other words, when you type an address into Google Maps, you could request biking directions instead of driving directions.

In some cities, there is an option to select public transit options rather than driving directions. It’s called Google Transit and Detroit SMART bus routes are included. It’s a very cool mashup.

So why not do that for bikes? Google apparently likes bikes. They sell Google bike jerseys. Their Ann Arbor office has secure bike parking. They encourage their Birmingham employees to commute by bike.

I think the biggest problem is safety. (more…)