I was driving on the westbound 101 around 8pm in the Reseda, California area when I spotted a blindingly bright light hovering off to the right side of the freeway. At first I thought it may have been a plane flying in my direction at an extremely low altitude. Then the object began to descend straight down, a small but noticeable distance, and continue to hover over the residential area of Reseda. I turned to by boyfriend in the passenger seat and told him I knew what I was looking at.At this time a freeway sound wall blocked our view while I was driving in the inside lane. I quickly shifted to the fast lane and waited for the object to come back into view. The object had to be relatively low in the sky if the sound wall and tree tops could easily block our view. When the object was visible again, all the bright lights had been shut off and now the craftï¿½ï¿½ï¿½s anti-collision/beacon lights were blinking, and I could clearly see the outline of the unit under the full moon. Disk shaped, with a protruding top and bottom, with the blinking lights arranged around the widest part of the craft. It looked as though it was made of dark grey metal since it was reflective in the moonlight.We had driven around the craft, proving that it was stationary, and decided to circle back to get another look. In the 2 minutes that I was able to circle around back to the craftï¿½ï¿½ï¿½s original location, it had moved higher up in the sky and less than a half mile west. We followed the craft by street and observed it, now stationary again, for 15 to 20 minutes. Every now and then we would see the lights on the craft dim and brighten, then descend straight down and hover. On the craftsï¿½ï¿½ï¿½ low-lightï¿½ï¿½ï¿½ setting; we could see multiple colored lights blinking at different times. When it began to move further west, we followed again until it was just a small speck in the sky. We decided to finish our errand in Reseda and head home.We were now driving on the 101 southbound through Studio City, California at about 9pm when I looked up and saw another similar-looking craft with bright lights hovering over the freeway a little higher than the treetops. As soon as I pointed in its direction, the craft took off heading north over my vehicle. Again, we turned around to head north and follow but the craft had traveled a considerable distance and we decided it was too far. I believe that I may have witnessed two separate spacecrafts. It is also possible that it was the exact same craft that I saw in two different locations when considering its speed capabilities and the time in between spotting the craft(s).