A lot of commuting is experience and anticipation.
Put in the simplest form, as you approach a junction change down to a gear that you can use to either accelerate or stop, then prioritise the brakes by putting th hands in a place where they can operate the brakes
If nothing happens accelerate through, and go back to the gears as opposed to the brakes, if something happens you can safely brake.
Sounds complex, but soon becomes quite natural
Put in the simplest form, as you approach a junction change down to a gear that you can use to either accelerate or stop, then prioritise the brakes by putting th hands in a place where they can operate the brakes
If nothing happens accelerate through, and go back to the gears as opposed to the brakes, if something happens you can safely brake.
Sounds complex, but soon becomes quite natural