Next time you are in Strasbourg, as I used to be regularly some years ago, make sure you examine the stops on the excellent and expanding tramway—assuming you are not already in Strasbourg and/or are already examining the tram stops there. You are unlikely to spot any members of the Strasbourgeoisie looking attentively at anything other than the 'next tram' indicator, or they may stare inattentively along the tramlines. Tourists who sensibly use the tram whenever possible rather than taking taxis may puzzle over the route map and the ticket machine. But they may be overlooking the feature that makes the Strasbourg tramway unique: the texts displayed at the top of the broad columns near the centre of each platform.
      The texts were provided by the literary group Oulipo (OUvrier de la LIttérature POtentielle—Potential Literature Workshop). The local authorities are to be congratulated on their creative and imaginative commission. Would that other local authorities had such verve.
      Six texts are provided at each stop: two are short items that resolve in a phrase that is a (frequently obscure) play on words, one is a short list of proverbs, sayings and titles in which tram or tramway replaces one of the words, eg:
      A rolling tram gathers no moss
      All roads lead to tram
      At night all trams are grey
      Et Dieu créa le tram
      Je tram, moi non plus
      Le tram, c'est moi
      Zazie dans le tramway
and two provide a derivation of the name of the stop, which are usually contradictory and often biographical:

ÉMILE MATHIS (1869-1954) Pseudonym of Henri Matisse, painter, twin brother of painter Henri Matisse (1869-1954). He chose this pseudonym to avoid any attribution errors. Nonetheless, his style is similar to that of his brother and their works were, and still are, often confused.

Which you have to admit is no less entertaining than the potted biography of the true Emile Mathis (1880-1956; Strasbourg-born motor manufacturer who split from Bugatti in 1910 to establish his own marque).

At the Porte de l'Hôpital, close to the hotel where I used to stay, one of the texts on one side of the tracks reads in translation as follows:

PORTE DE L'HÔPITAL (actually Philippe de la Porte de Dieuleveult de l'Hospital), Strasbourgeois inventor (1689-1749). — Unfortunate inventor of perpetual motion (see detailed notice opposite).

Cross the tracks and you find this text:

PORTE DE L'HÔPITAL (actually Philippe de la Porte de Dieuleveult de l'Hospital), Strasbourgeois inventor (1689-1749). — Unfortunate inventor of perpetual motion (see detailed notice opposite).

Finally, the sixth text is a short 'story' using only words that can be formed from the letters of the name of the stop. As these cannot be translated successfully, here are some of my own, based on the stops I most frequently used.

Porte de l'Hôpital
The proper tool at Do-It-All led Leo to hate all toil. Tell Phil to let Pete dial the little hotel, repeat a part or the lot to the patriot.

Homme de Fer
One more dome of Rome. Oh mode of freedom, free me from red deer.

Baggersee
A sage bargee begs a beer, grabs a ragbag, gabs: 'See 'ere, geese. Grease a bee. Arse eggs are gear. Agree?'

The texts on the A line of the Strasbourg tramway are available on an unofficial website.

Warning, especially to American readers.
Do not confuse the Strasbourg tramway in France with the Strasbourg Railroad in southern Pennsylvania, which used to run excursions with look-alike Thomas the Tank Engine locomotives. Another literary source, perhaps, but you will look in vain for Oulipian texts on the line between Strasbourg and Paradise, PA. On second thoughts, there may be some 'found' texts.
      I recall Paradise as the vicinity where I first encountered whipped cream from an aerosol can. Paradise Resprayed.