HOUSTON (KTRK) -- Charges have been filed against a man who stopped traffic on a busy freeway for a marriage proposal.The proposal happened on the North Freeway near downtown Houston on Sunday. Eyewitness News learned Tuesday that Harris County District Attorney's Office is charging Vidal Valladares, 24, with obstruction of highway, a class b misdemeanor.We spoke with the couple on Tuesday, as Valladares said he was going downtown to answer to the charges."I'm feeling bad, and of course," said Valladares. "I'm wanting to apologize to everyone if I caused any problems. That wasn't my intention in the beginning. I just...