Frequent occurrence of drivers driving the wrong way on W Adams between Halsted and Des Plaines. Some to access the onramp northbound to 90/94, some to the south alley to Quincy and some driving to Des Plaines. This happens at a variety of speeds. Some drivers appear to be aware that they are driving against traffic while others appear oblivious. Part of the issue is the lack of clear signage for the two parking lots at the east corners of W Adams and Halsted indicating that it is a one way street. Can the signage be adjusted to clearly indicate this? It is unlikely to eliminate the issue, but likely to reduce the number of times that it occurs. We watch this daily. It is more frequent on weekends. Very unsafe!