Your comment comes across as arrogant and (embarrassingly for you) you’re wrong. There are more variables - the direction the roads go in. The changing position of the sun during the journey. The date and time. It’s nothing like as clear cut as you make out.

Try “London to Edinburgh” at this time of year and you’ll see what I mean - there’s only 10% difference in sun exposure between the two sides of the bus.

Congratulations on your superior sense of orientation.

The sun doesn't rise in the East and set in the West though. And a random short route I put in had about 30 turns and all kinds of angles. Not everywhere is a US grid city :-).

Not all routes are a straight line. The time of day also matters…