Even more, watch out for those painted lines and crosswalks. I make a habit of riding between the crosswalk lines. I also always try to avoid manhole covers and other indents. In part because they're just big bumps while riding but also because they pick up debris so I suspect you're more likely to get a flat by riding over them.
And of course, folks aren't expecting you out there and the sun is rising later, so be extra careful as weather gets colder.
Carl