COLUMBIA, Mo. (KMIZ) The City of Columbia is following the lead of other Missouri cities by implementing a median ordinance set to take effect July 1. The City of Springfield put its median ordinance in place in January 2018. Both ordinances focus on medians in intersections with speed limits of 35 mph or higher, average daily traffic volumes of at least 15,000 vehicles, or medians narrower than 6 feet. According to previous reporting, Maj. Eric…