[pliftkl]

Depends a lot on the jurisdiction. In Austin, the police will declare "no-refusal" weekends (typically holidays) in which they declare in advance that they'll get a warrant for a blood draw in the case of refusals. If you look at the DUI arrest stats for those weekends, about half of them involve warrant based blood draws after breathalyzer refusals.

[teamspirit]

Does this imply on the other days one can refuse and not get their blood drawn? Otherwise, what's the point of a "no refusal weekend?"

[justrealist]

It's up to the judgement of the officer whether to get a draw at other times.