The westbound exit ramps of Bobby Jones Expressway (I-520) were blocked this morning by an 18-wheeler that was on fire. A second vehicle fire, unrelated but on nearby Wheeler Road, was also hampering morning commuters, dispatchers said. According to a statement from the Richmond County sheriff’s office, deputies and firefighters are on the scene and the ramp is expected to be blocked for an extended period of time. Syncronex: Metered