Downtown light-rail riders: Your patronage of public transit isn’t enough. A giant billboard covering most of the facade of the 2-story building at 312 Main St. now urges passengers emerging from the northbound Preston stop to get rid of their vehicles altogether. The unassuming Houston Site Acquisitions storefront has scrapped its own above-door signage in favor of a story-high ad for Texas Direct Auto, complete with oversized doggie in the window.
Large-scale advertising for businesses not currently in the building is nothing new for this block of Main St.: Just next door, the sky-high neon above perpetually hungover neighbors Dean’s and Notsuoh still heralds the days of credit clothing retail. But the Texas Direct Auto ad incorporates the structure of the building itself, placing the large image of a small dog behind an actual window visible through a cutout in the wrap:
A drive-in customer may have 
