Search Results for: Chicago and the end of Critical Mass

What does “Critical Mass” mean to you?

If you played word association with Joe and Jane Random, how would they respond to Critical Mass? In 1934, Hungarian phycisist Leó Szilárd filed his patent for a neutron-induced nuclear chain reaction and introduced the concept of “critical mass.” The critical mass is the smallest amount of fissile material needed for a sustained nuclear chain read more »

Critical Mass in 1896

Here’s an interesting article [PDF] on “The Great San Francisco bicycle protest of 1896.” Since the 1880’s, riders across the country had lobbied for access to the streets. Increasingly organized, their mission was political and social as cycling became a way of life. Bicyclists demonstrated in large American cities, including Chicago, where wheelmen and wheelwomen read more »

Illinois three foot law

Illinois enacted a three foot passing law in 2007. That didn’t help David and Cindy Combs, the disabled couple from Champaign, IL who were hit by a driver as they rode their tandem bicycle to choir practice on Monday afternoon. Cindy, age 53, was killed in the crash. Her widower David remains in critical condition.

Contest: Pedaling Revolution Book

Update: Contest and comments closed. Pedaling Revolution: How Cyclists are Changing American Cities In a world of growing traffic congestion, expensive oil, and threats of cataclysmic climate change, a grassroots movement is carving out a niche for bicycles on the streets of urban cityscapes. In Pedaling Revolution, Jeff Mapes explores the growing urban bike culture read more »

Mostly Non Tour bike news

Hi all, I hope you had a nice weekend. My family and I were in our small town’s parade and then we watched the fireworks Saturday night. Several people (including my family) walked and biked to the fireworks and back. Bicycle paramedics save a life. “The Fire Department’s response time at [the event] is less read more »

RIP Dr. Dan Kliman

A body found in an elevator shaft in San Francisco over the weekend has been identified as Dan Kliman, MD, a passionate and outspoken cycling advocate. Although the Chronicle describes Kliman as a man who kept to himself, friends and cycling advocates in San Francisco and the East Bay are shocked and saddened at his read more »