The state Smart Transportaion Initiative (SSTI) posted a story by Chris Spahr, One-way or two-way streets more efficient? It depends on what you measure. Chris tells about the work of Vikash Gayah of Penn State that makes the case in a Transportation Research Board paper that the concept of “trip serving capacity” is a better metric of transportation netowrk efficiency than current transportation engineer measures of vehicle moving capacity, a measure of cars going fast to no particular destination. It is so time for a change in how transportaion planning is accomplished. The following is an excerpt from the story.
“The debate over one-way versus two-way streets has been ongoing for more than half a century in American cities. Counter to prevailing engineering wisdom, a new study finds two- way streets may be more efficient, if one is measuring getting people to their destinations.
Many cities have recognized that two-way streets provide substantial benefits to downtown neighborhoods for a variety of reasons:
- Two-way streets are better for local businesses that depend heavily on their visibility to passersby.
- Two-way streets have been found to be safer than one-way streets. One-way streets correlate with higher speeds and decreased levels of driver attention. Pedestrians prefer crossing two-way streets since drivers tend to travel more slowly on them, and vehicular conflicts are more predictable.
- Two-way streets are much less confusing for downtown visitors than one-way streets. Visitors driving in a two-way grid network can easily approach their destination from any direction.”