Samuel I. Schwartz, a.k.a. "Gridlock Sam," is one of the leading transportation engineers in the United States, and is widely believed to be the man responsible for popularizing the phrase gridlock. He originally worked as a cabbie. He eventually held a top post in New York City's transportation department for many years and now operates as a private consultant. Wikipedia
The definitive Wikipedia entry for Sam Schwartz. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Sam_Schwartz
gridlocksam Gridlock Sam is a respected leader and source of traffic/transportation/transit information; the most reliable and timely source of consumer-focused traffic information for the driver, walker, biker, bus and subway riders. www.gridlocksam.com
Sam Schwartz PLLC (SSC) is an interdisciplinary transportation engineering and planning firm founded (as The Sam Schwartz Company) in 1995. www.samschwartz.com
