If you’ve taken a D.C. taxicab since the stroke of midnight last night, you may have been surprised by a cab driver insisting that you pay an extra $1 gas surcharge. Didn’t the gas surcharge expire in September? It did, but last week the D.C. Taxicab Commission quietly passed an emergency measure to bring back the $1 fee, beginning at 12:01 a.m. this morning and lasting until 11:59 p.m. on Tuesday, January 29, 2008. “Prices…