To set off, get going; to start a journey.
To go off quickly: to hurry up.
To amble; to walk or proceed in a leisurely manner.
To take upon oneself; to start, to embark on (a specific task etc.).
To commit oneself (to an obligation, activity etc.).
To pass a slower moving vehicle on the curbside rather than on the side closest to oncoming traffic.
The passing of slower traffic on the curbside rather than on the side closest to oncoming traffic.