I was driving South on Hwy 29 and noticed two bright lights coming towards me. Other drivers were slamming on their brakes so I had to pay attention to the road. I couldn't get over fast enough to get my phone out the window for a good video. I believe this UFO was traveling from west to east but it was very low and traveling a bit fast. The lights were bright and flashing but only on two ends. It was very dark outside and I could faintly make out the shape but it was huge. The size of a football field! By the time I waited for a red light, so I could safely pull over it had disappeared from my view. I have been looking on the Internet to see if anyone else reports this but have not found similar activity. Yet! Recently there has been a lot of UFO activity in the sky over Northern California. I see much of this because I walk my dog at night, however I'm not sure I want to see all of this. I don't like it and am afraid of it. These UFO's do not seem to want to hide the fact that they are in the sky. And I know if I see them; anyone watching our sky to protect our airways is seeing them. They fly very low and have bright flashing lights. I observed three different UFO's last night, Sept. 29, 2017, one had only large red lights flashing while the other two (both flying in separate directions) had bright white lights. They.were crossing each others flight path. An airplane crossed just in front of one and I watched to see if they were going to run into each other. The airplane was going much faster and flying in the normal flight path. I live close to an airport and know where airplanes come and go and how low or high they fly. The airport is very small. The UFO's don't seem to have any specific path, they just fly wherever they fly; sometimes side to side and then in an up and down pattern. Nothing at all like an airplane. A lot of the time, recently; these UFO's hover over certain areas (surveillance)? Airplanes cannot just sit in one spot for prolonged periods. The two UFO's last night (with white flashing lights) seemed to be trying to divert attention from the larger UFO with the red lights which was flying much too low, as if landing! That is what I thought because they came from separate areas of the sky and then they crossed each other path; one being lower than the other and neither one flying in a straight line or at a constant speed. Most of the recent activity that I believe to be UFO activity; are aircraft of some sort, flying too low to be airplanes or helicopters and not low enough to be mistaken for a drone. Too large to a drone! Too low and slow to be airplanes and much too large!