bikeway design | Transportation Research and Education Center

Portland's Cycle Track and Buffered Bike Lanes: Are they working?

The video begins at 2:04.

Abstract: Findings will be presented on an evaluation of two innovative bicycle facilities installed in late summer and early fall 2009 in downtown Portland aimed at providing a more separated and comfortable experience for cyclists. The SW Broadway cycle track (near PSU) and the couplet of buffered bike lanes on SW Stark and SW Oak were evaluated to understand how they are functioning on multiple levels. Each facility involved removing a motor vehicle lane by restriping to provide additional roadway space to bicyclists. The facilities were evaluated after they had been in place for approximately one year. Data collected to support this evaluation consisted of surveys of multiple user groups for each facility type, and video data collected by the City of Portland Bureau of Transportation at intersections along each of the routes to understand the facilities' impact on traffic flow, operations and user interactions.

Are e-bikes faster than conventional bicycles?

Learn more about our other research on e-bikes here.

Over the last couple years, electric bicycles (e-bikes) have been gaining momentum. E-bikes may play an important role in addressing cities’ transportation and public health problems by getting more people out of cars and onto bicycles. But as the number of users increase, so too will potential conflicts (actual or perceived) with other road users, causing policy questions to arise.

The current state of e-bikes regulation varies dramatically across state and local jurisdictions, causing confusion. The confusion stems from the wide variety of devices and technologies on the market, perceived overlap of legal entities’ jurisdiction over the device, outdated or absent laws and regulations, and inconsistency of terms used to describe e-bikes. This confusion creates uncertainty for manufacturers and dealers and makes riders wary of embracing e-bikes.

One of the biggest concerns people have about e-bikes and their use, especially on shared-use paths, is speed....

Rails-with-trails: issues related to safety, design, planning, and implementation of trails next to active railway lines

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Seven quick things I learned about bicycling nationally

By Jennifer Dill, TREC director.

I recently completed a national poll of people living in urban areas in conjunction with the National Association of Realtors® on Community and Transportation Preferences. The overall results are posted here. The survey included 3,000 adults living in the 50 largest urban areas in the U.S. (That includes suburban areas, as well as denser urban cores.) Here are some highlights related to bicycling.

1. Less than one in five people have biked in the past month.

Overall, 72% of the adults surveyed said they were physically able and know how to ride a bike. Of those, 25% had ridden in the past month. (The survey was conducted in mid-May, so weather was reasonable.) That means only about 18% of adults in these urban areas biked recently. Most of the people who had biked, rode only for exercise (60%, or 15% of those who are able to bike), while the others (40%, or 10% of those who are able to bike) made at least some bike trips for transportation, such as to work, school, shopping, etc.
Note: From here on I will be focusing only on those people who are physically able and know how to ride a bike.

2. There are gender and generational gaps.

This isn’t a big surprise, but women were less likely to bike than men,...

Towards Effective Design Treatment for Right Turns at Intersections with Bicycle Traffic

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The overall goal of this research was to quantify the safety performance of alternative traffic control strategies to mitigate right-turning-vehicle/bicycle collisions, often called "right-hook" crashes, at signalized intersections in Oregon.

A two stage experiment was developed in the OSU high-fidelity driving simulator to investigate the causal factors of right-hook crashes at signalized intersections with a striped bike lane and no right-turn lane, and to then identify and evaluate alternative design treatments that could mitigate the occurrence of right-hook crashes.

Experiment 1 investigated motorist and environmental related causal factors of right-hook crashes, using three different motorist performance measures:

visual attention,
situational awareness (SA) and
crash avoidance behavior.

Data was collected from 51 participants (30 male and 21 female) turning right 820 times in 21 different experimental scenarios. It was determined that the worst case right-hook scenario occurred when a bicycle was approaching the intersection at a higher speed (16 mph) and positioned in the blind zone of the motorist. In crash and near crash situations (measured by time-to-collision) the most common cause was a...

Why doesn't that traffic signal ever turn green? An evaluation of roadway markings for cyclists

The video begins at 1:37.

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Summary: Signalized intersections often rely on vehicle detection to determine when to give a green light. The 2009 Manual of Uniform Traffic Control Devices (MUTCD) includes an on-pavement marking and curbside sign that public agencies can use to indicate where cyclists should position themselves while waiting at an intersection. This presentation reviews the effectiveness of current markings, signs, and other methods used to help cyclists properly position themselves over detection.

Stefan Bussey is an undergraduate civil engineering student at Portland State University. He is interested in exploring how road users’ interactions with each other and the built environment affect the efficiency and safety of road networks. He currently works as a civil design intern at Harper Houf Peterson Righellis Inc.

Beyond the Bike Hook: Linking Bicycles and Transit

The video begins at 2:58.

Abstract: While TriMet and other transit agencies serve many commuters by having racks for bikes on trains and buses, large bike parking facilities in global capitals of urban bicycling provide the key link between bikes and transit. Following the lead of European and Asian cities, the Portland region is starting to develop a network of bike-transit facilities; TriMet is piloting smart bike parking technology in the form of electronic bike lockers and "Bike & Rides". This presentation discusses the background and planning for bike-transit integration in the region and shares insights into bike-transit travel patterns, habits, and market segmentation gained from recent rider surveys.

Planners May Soon Get More Help When Designing Protected Bike Lane Intersections

Youth Mobility Concepts--Planning Safe Routes for Kids

The video begins at 2:10.

Portland State University