The Aire–Fruges and Rimeux-Gournay–Berck railway (French: Chemins de fer d'Aire à Fruges et de Rimeux-Gournay à Berck, pronounced [ʃəmɛ̃ də fɛʁ dɛʁ a fʁyʒ e də ʁimø ɡuʁnɛ a bɛʁk]; CF du ARB) was a 1,000 mm (3 ft 3+3⁄8 in) metre gauge railway from Aire-sur-la-Lys to Berck, in the Pas-de-Calais department of France.

This avoided the duplication of routes that was seen in the United Kingdom and meant that the large cities and towns were connected.

The citizens of the smaller towns and villages also wanted railways to be built to connect them to the network.

In April 1887, an agreement was signed with the CF AC to obtain running powers over the section in question.

On 12 December 1889, the préfet declared the railway to be d'utilite publique (in the public interest) and M. Lambert was given permission to build the line.

[6] Although initially operated as separate systems, by 1893 the AC and CF du ARB were being run as on, with locomotives and rolling stock from one line being used on the other.

[8] The line was much longer due to the need to avoid heavy engineering and serve the communities along the route.

[10] In 1892, a railway was planned from Dompierre-sur-Authie, Somme to Wailly, linking with the Réseau des Bains de Mer system.

The 26-kilometre (16.16 mi) long line would have had intermediate stations at Tortefontaine, Douriez, Saulchoy, Saint-Rémy-au-Bois, Campagne-les-Hesdin, Buire-le-Sec and Bois-Jean.

Civilian passengers had to leave their train and go into the station building to have their papers checked when crossing Cantons.

A procedure which led to complaints as some passengers missed their train when it departed whilst their papers were being checked.

[17] In late April, 296 Railway Company, Royal Engineers established a major depot at Rang-du-Fliers.

[19] In August, a chord was laid at Gourgesson Junction enabling trains to run directly between Aire-sur-la-Lys and Anvin without reversing.

[23] World War II broke out on 3 September, with Calais falling into German hands on 25 May 1940.

The Pas-de-Calais department became a zone of special control, administered by the Oberkommando der Wehrmacht in Brussels, Belgium.

[25] Services were again reduced due to the German authorities requisitioning some of the locomotives and stock of the CF du ARB.

Some of the carriages were running in December with missing glass, leading to complaints in a local newspaper.

[28] By May 1945, services on the CF du ARB had been reduced even further, caused mainly by a shortage of fuel.

[29]} In 1948, the department tried to have the concession to run the CF du ARB removed from VFIL, claiming that the latter were unreliable concessionaires.

The closure was lamented by "the Voice of the North" (French: La Voix du Nord), which published a song to mark the end.

[34] Stations were of a standard design with a two-storey main building and a single story wing for freight.

[41] For the opening of the line, the CF du ARB bought ten bogie carriages with end platforms.