There are some busses being used outside the city proper, in the lower-density surroundings. In the core of the city things are approximately barred to vehicles — the delivery trucks seem to be limited to just over walking speed, and frequently have to wait for pedestrians. There are not designated pedestrian crossings, people just cross the street wherever. It's not obvious how people travel longer distances in the city, until she notices people vanishing into and emerging from subterranean areas in waves. Probably most journeys longer than walking distance use some kind of metro system.
Many of the hexes do have tunnels through them, though! Either because they have private gardens in the center, and there are tunnel-like accesses, or as more of a mall-like thing where the first few floors of the building are all shops and businesses. Either way, people can walk in from the street and then exit from the other side of the building a few minutes later.
The colored sashes are a little hard to guess, but she can observe some patterns and facts about them:
Everyone has them, even young children. Some people wear them over their left shoulder and some over their right shoulder. Nobody speaks to people wearing red sashes. People wearing pink-and-purple sashes tend to be wearing less other clothing, and what they do wear is form-fitting. People working in stores dominantly have purple sashes. Kids disproportionately have green or brown sashes. Adults who are not working are disproportionately wearing blue or rainbow-with-intricate-knotwork sashes. She notices people nodding respectfully to a woman in a golden and purple sash as she walks down the street. One particular building has people wearing white sashes and scrubs; no other buildings seem to have white sashes.
The complete list of colors is: White, Brown, Purple, Green, Blue, Red, Rainbow, Pink, Pink-and-Purple, Purple-and-Black, Purple-and-Gold.
There are a few handy copses of trees where she could land as a bird and transform, sure. Or, given that the buildings are climbable, she could duck behind an HVAC exhaust vent on a roof. (Some of the roofs have little cafés and things on them. Zen gardens with raked patterns of gravel also seem popular.)