simple & memorable advertising of night services in Switzerland

Fribourg is 'one Switzerland's the best-maintained cites and sits on a small rocky hill above the valley of the Sarine'.

The bus network there is currently operated by the Transports Publics Fribourgeois, who have just introduced night services on a number of their routes. Three of the ads to promote that fact can be seen below.

A strong, single message and one logo to say who it's from. Simple, clean, memorable and effective communication. 

Such a shame that examples of that approach are few and far between in the UK bus industry.