Night work will cause traffic issues on Hilltop Drive for the next month, starting Tuesday. P-G-&-E is replacing about a quarter mile of gas main in the area of Hilltop Drive and Palisades Avenue. Crews will work on Hilltop between 6 PM and 7 AM and on Palisades between 7 AM and 5 PM. All the work will be done Mondays through Thursdays, with completion expected around the beginning of November.