Wiktionary
a. Not congested
Usage examples of "uncongested".
As a result the inhabitants of Athens had plenty of exercise, uncongested streets—and no traffic accidents.
It's still early enough in the day for the road to be relatively uncongested and we speed along past Runaway Bay and Ocho Rios without incident.
She found the Grinning Eel in a reasonably uncongested area, a large walled establishment much like Nossik's, torchlit now, the flickering red light making the Grinning Eel look like he was flexing his loops and laughing at whoever rode through the arch beneath his swinging sign.
Fired up the Benz and was on an uncongested Merritt Parkway by six forty-five.
Altogether the zone below them was empty and uncongested, and Kerans felt convinced, though for no rational reason, that Hardman would not be found in the north-west sector.