Traffic was snarled on Interstate 45 in southeast Houston after a truck turned over and lost a load of metal and other materials on the ramp to the 610 Loop Monday morning. The mishap occurred about 8:20 a.m. on the ramp from the northbound Gulf Freeway to the eastbound South Loop, according to Houston TranStar. The mishap forced officials to temporarily shutdown the ramp for hours while emergency crews cleared the area.