Renovating a Multipurpose Main Street

Greenville Avenue’s new streetscape (Source: City of Dallas)    Streetscape improvements have helped bring back an 18-hour-a-day character to the corridor. Crime has dropped and property values have risen.    Note: This case study was written for the Institute for Transportation Engineers new bookImplementing Context Sensitive Design on Multimodal Thoroughfares, funded by the Federal Highway Administration. Greenville Avenue is the main street of a 1920s “streetcar suburb,” Lower Greenville, four miles from downtown Dallas, Texas. The context had become automobile-oriented over the years as space was given over to motor vehicles and the design allowed for speeds uncomfortable to pedestrians. Businesses … Read more

American Speed Limits Are Based on 1950s Science

Around 40,000 people still die on American roads every year, but technology and data could change that. Image: Garrett/Flickr Speed limits might make you feel safe, or incredibly frustrated, or both. But either way there’s a bigger issue at hand: they’re based on outdated data and science from the mid-20th century. In the US, our speed limits are derived from old studies, like this one from 1964 by traffic systems researcher David Solomon that looked only at rural roads in the 1950s. In line with conventional thinking, Solomon’s study fuels the premise that speed limits should be based on the speed at … Read more