Class Z23500 is a class of railway electric multiple units operated in France. They were built by Alstom

Alstom

Alstom is a large multinational conglomerate which holds interests in the power generation and transport markets. According to the company website, in the years 2010-2011 Alstom had annual sales of over €20.9 billion, and employed more than 85,000 people in 70 countries. Alstom's headquarters are...

 and Ateliers du Nord de la France

Ateliers du Nord de la France

Ateliers de Construction du Nord de la France was a French locomotive manufacturer, based at Crespin in northern France. Later known as ANF Industrie or ANF the company was acquired by Bombardier Transportation in 1989 and is now part of Bombardier Transport France S.A.S.-History:Ateliers de...

, (which became Bombardier

Bombardier Transportation

Bombardier Transportation is the rail equipment division of the Canadian firm, Bombardier Inc. Bombardier Transportation is one of the world's largest companies in the rail-equipment manufacturing and servicing industry. Its headquarters are in Berlin, Germany....

) for SNCF

SNCF

The SNCF , is France's national state-owned railway company. SNCF operates the country's national rail services, including the TGV, France's high-speed rail network...

 and are used on the TER

Ter

Ter is a prefix or suffix designating the third instance of a thing, thus following bis and preceding quater.Ter can also refer to:* River Ter, in Essex;* Ter , the debut album of American rock band Sweet Water...

 Network. These sets consist of 2 double deck coaches. They were built from 1997 and a total of 80 units were built. The units were ordered by the following regions: Provence-Alpes-Côte d'Azur

Provence-Alpes-Côte d'Azur

Provence-Alpes-Côte d'Azur or PACA is one of the 27 regions of France.It is made up of:* the former French province of Provence* the former papal territory of Avignon, known as Comtat Venaissin...

, Nord-Pas-de-Calais and Rhône-Alpes

Rhône-Alpes

Rhône-Alpes is one of the 27 regions of France, located on the eastern border of the country, towards the south. The region was named after the Rhône River and the Alps mountain range. Its capital, Lyon, is the second-largest metropolitan area in France after Paris...

. They are mainly used on stopping services around the French Riviera

French Riviera

The Côte d'Azur, pronounced , often known in English as the French Riviera , is the Mediterranean coastline of the southeast corner of France, also including the sovereign state of Monaco...

(Provence-Alpes-Côte d'Azur), Lille (Nord-Pas-de-Calais) and Lyon (Rhône-Alpes).They are all in the TER livery, which is a Blue Front in a diagonal line with a metallic grey side. However the Rhône-Alpes units have green and purple sides with Rhône-Alpes written on the side in Large writing.