[Tagging] different access restrictions for different entrances to an area

[Anthony]

On Mon, Oct 31, 2011 at 6:06 AM, Martin Koppenhoefer
<dieterdreist at gmail.com> wrote:
> 2011/10/28 Anthony <osm at inbox.org>:
>> Granted, this does raise issues.  Besides the fact that oneway=yes on
>> a barrier=gate is not well defined, there isn't, to my knowledge, a
>> way to distinguish "requires code or clicker which is given to
>> residents" from "only accessible by maintenance personnel (and
>> possibly emergency services)".  And both seem to me to be a somewhat
>> common situation.
>
>
> IMHO the by far most often occuring situation are exit gates that can
> be used only in case of an emergency (but then by everyone, not only
> emergency services).

How is that enforced?