Posts Tagged ‘road diet’

Mode bias in traffic forecasting

Tuesday, March 2nd, 2010

Recently released 2009 National Household Travel Survey from the Federal Highway Administration documents transportation mode choice trends. From 2001 to 2009, the percentage of biking, walking, and transit trips have increased while vehicle trips have fallen.

According to the Mobilizing the Region web site:

Of course, the good news for walking, bicycling and transit use may reflect fluctuating gasoline prices and the current economic recession (respondents were surveyed between March 2008 and April 2009). But when asked to interpret the findings, FHWA staff told MTR that “the general public is more aware of the need to walk and bike for environmental and health reasons, thus they make more of those trips and they report more of them in our survey.”

What we have found in Metro Detroit is traffic engineers assume there will be increased vehicle traffic, even in cities which have undergone drastic populations drops like Royal Oak and Detroit. (Note that according to U.S. Census data, Royal Oak’s population decline rate is slightly higher than the city of Detroit’s since 2000.)

Assuming increased vehicle travel often means our roads are wider than they need to be — width that could be converted into bike lanes.

Washington Boulevard in Royal Oak

For example. last year we tried pushing the city of Royal Oak to change Washington Boulevard before it was repaved between Lincoln and Woodward. We asked for a 4 lanes to 3 road diet which would have added bike lanes while increasing safety for all users. We were told that the city was projecting an increase in vehicle travel on Washington over 20 years and therefore could not reduce the number of lanes.

This projected increased was standard practice but completely unrealistic given that:

  • Washington Avenue north of Lincoln had already been road dieted from 4 to 3 lanes.
  • Woodward vehicle traffic was declining.
  • Royal Oak’s population is dropping.

(Of course what’s ridiculous is that the road diet could have occurred for the time being. If that vehicle traffic did return, the road could be re-striped. In the meantime, there would be increased safety for all travel modes. Clearly safety was not the highest priority in this decision making process.)

I-94 Expansion in Detroit

Another example is the planned expansion on I-94 through Detroit. MDOT is still forecasting increased vehicle traffic even though the actual numbers show no increase.

On the other hand, MDOT decided to remove two pedestrian bridges after concluding they weren’t justified given the existing pedestrian and bicycle traffic. MDOT did not project any growth for biking and walking on these bridges despite the US DOT policy statement that such projects “should anticipate likely future demand for bicycling and walking facilities.”

Their bias is apparent.

We need to ensure that Metro Detroit transportation projects realistically and consistently forecast traffic for all modes.

Ferndale city council elections: Yes and No

Sunday, October 25th, 2009

Many city council seats are up for election this November 3rd. This is a great opportunity to elect people to a decision making body that can a city more bike and pedestrian friendly.

There are two seats being decided in Ferndale. And among the four candidates running, two are on opposite sides of the spectrum when it comes to supporting biking.

No for Gagne

Tom Gagne, the self-proclaimed “most argumentative” candidate, is someone cyclists won’t want on Council.

Gagne wants to increase development on Hilton. He’s been quoted in the Daily Tribune saying”

What are we going to do about Hilton Road? It’s a thing of beauty that lives in the shadow of Woodward. I’d like to let developers know that bike lanes on Hilton Road aren’t permanent.

Hilton Road underwent a road diet, which took it from four lanes to three with bike lanes added. Road diets reduce crashes and excessive speeding (and noise), while making it safer for bicyclists and pedestrians.

And the Hilton road diet doesn’t displace motor vehicle traffic. Hilton near Nine Mile has a daily vehicle count of around 7,000. The vehicle counts on Hilton could more than double and the current lane configuration would not be a problem.

Clearly Gagne is uninformed about the benefits of the Hilton road diet. There is no justification for suggesting their removal.

But perhaps what’s more troublesome is he’s equating development only with motor vehicle travel. Wouldn’t it be better if Hilton development catered to the neighborhood? Imagine if the Hilton were lined with more businesses and destinations that residents could bike or walk to and spend their dollars locally?

Melanie Piana for Ferndale City CouncilYes for Piana

Melanie Piana is also running for a seat on the Ferndale City Council.

Her priorities include supporting “pedestrian [and] bicycle friendly… improvements to build our community.”

Her Facebook page includes the photo on the right.

According to Piana, “I commute to work by bike on weather friendly days. It’s easy when the office is only a mile away.”

And in speaking with Piana, it’s clear she understands the value in building safe bicycling and walking communities.

She’s also endorsed by the Eccentric.

Sharrows Mark Shared Lanes for Bicyclists

Monday, June 2nd, 2008

sharrow pavement marking for bike routesThey’re new and still experimental, but are expected to become formalized signage method by next year.

They’re called “sharrows” and they are pavement markings that help mark bike routes on roads. These are a complement to bike lane pavement markings. The difference is bike lanes are separated facilities (from motor vehicles) where shared lanes have both cars and bikes.

According to draft MUTCD language, the benefit of sharrow pavement markings are they:

  • Assist bicyclists with lateral positioning in a shared lane with on-street parallel parking in order to reduce the chance of a bicyclist’s impacting the open door of a parked vehicle,
  • Assist bicyclists with lateral positioning in lanes that are too narrow for a motor vehicle and a bicycle to travel side by side within the same traffic lane,
  • Alert road users of the lateral location bicyclists are likely to occupy within the traveled way,
  • Encourage safe passing of bicyclists by motorists, and
  • Reduce the incidence of wrong-way bicycling.

There are limits to their use.

  • They should not be on roads where the speed limits above 35 MPH.
  • They should not be on shoulders or in bike lanes

Sharrows may also produce cost and time savings.

Sometimes roadways are simply not wide enough for a bike lane.   Sometimes road diets (converting an exising lane of travel into bike lanes) are not practical or possible.  And even when a road diet might be the solution, some cities require traffic studies in advance.  These studies can cost $10K to $30K.  The value of a separated bike lane facility may not justify these costs when a shared lane would work equally well.  And sharrows provide a new and improved means for marking them.

Planning in Detroit: Old-School is out

Saturday, May 10th, 2008

An article ran in this week’s Free Press, “Engineer pushes for biking, walking paths

[Scott] Clein, an associate with Giffels-Webster Engineers in Detroit, helped chart out nearly 400 miles of potential routes ideal for walking and biking — with a few changes implemented by city officials.

Though his recommendations were adopted in the city’s Master Plan in 2007, Detroit’s movers and shakers have been sluggish in making the necessary changes to encourage more foot and pedal traffic, he said.

With few government officials willing to take the plunge, community groups and individuals will have to take charge if they want to see more bike and walking lanes, he said.

Clein also was a Metromode guest blogger last fall where he’s covered more details on road diets, zoning, planning, and more.  Scott’s entry below clearly represents the struggle cycle advocates face in Royal Oak and other nearby communities:

Many traffic engineers are stuck in old-school thinking. The old-school way of thought, for those of you not tuned in to the inner workings of transportation planning, can be summed up as follows:   more is better. The more vehicles we can get through a road segment, the better off we are. And a larger number of travel lanes mean more vehicles per hour.

We tip our collective m-bike helmet to Scott and look forward to working with him down the reduced-width road.

Dan Burden is changing how towns think about traffic

Monday, November 19th, 2007

From the Michigan Land Use Institute: “It’s not that Mr. Burden dislikes cars. It’s just that he is certain that the quality of life improves if people don’t spend so much time sitting in them. And, like everybody else, he can’t stand congestion. He’s come up with some unexpected solutions. The answer to traffic congestion in most towns isn’t making roads wider, says Mr. Burden. Just the opposite: Roads need to be put on a “diet.” Taking lanes away slows traffic but, surprisingly, the road then actually carries more vehicles more efficiently. Mr. Burden has other traffic remedies, such as shrinking intersections, constructing roundabouts, building boulevards with divided medians, and designing places where people can walk, bike, and ride public transit.”