Two officers were standing outside their vehicles in front of the bridge entrance. Both officers were in front of my vehicle when I stopped at the stop sign to continue straight. There was no oncoming traffic due to bridge being closed. This is normally a three way traffic stop. Officer got in his vehicle and then pulled me over claiming to have seen me tap my brakes but not stop completely. I said I did stop and he said that both of them saw me not stop. I then said I was looking over at the bridge at the time and he said "that's not good". I believe I came to a stop and had looked over at the bridge maintenance going on and noticed the road was closed. I don't think the officer could have seen me tap my brakes as he was standing in front of the bridge as I was approaching not behind me.