Midwest Mobile Billboards is an innovative provider of outdoor mobile billboard advertising in the Chicago and market and throughout the Midwest. Their X-Large Mobile Billboards are the largest size capable of moving around in the Downtown Chicago area with only 1" room to spare under the viaducts. They build their trucks to provide the largest space available to you. While many of the companies have downsized their mobile billboard sizes, they continue to build their mobile billboards to the limits.