Joel Kotkin and I wrote in the Orange County Register that transit work trip market shares in the Los Angeles area had changed little, from 5.9 percent in 1980 to 5.8 percent in 2013. In a response, the Los Angeles Metropolitan Transportation Authority (LACTMTA) noted that we did not cite sources. Fair enough. Our source was the 1980 US Census and the 2013 American Community Survey, a product of the United States Census Bureau. read more »