slow

at a ~
The traffic was moving at a slow crawl.

be down to
The traffic on the motorway was down to a crawl.

slow (down) to

slowly | about, along, around/round, away, back, fowards, through
We spent an hour crawling around on our hands and knees looking for the key.

manage to
As night fell, we managed to crawl back to our lines.

start to
Has the baby started to crawl yet?

across, along, into, over, out of, under, up
There''s an insect crawling up your leg!

crawl on (your) hands and knees