On 1 October 1989, the urban community decided to continue with the technical and financial studies leading to a project of two lines with a total length of 13.5 km (8.4 mi).

[7] In the municipal elections of 2001, François Cuillandre, who succeeded Pierre Maille as mayor of Brest, becomes the president of the CUB and launches studies concerning a new tramway project.

[7] By the end of 2002, the project was subsidized at 30%, the first consultations and preliminary studies were launched, and back then the start of work was set to be in 2010.

[8][9] In November 2003, when the preliminary consultation was about to end, the mayor of Brest announced that the line would link the Technopôle Brest-Iroise to the Kergaradec business park, serving the streets of Siam and Jean-Jaurès.

[10] It was also announced the transport payment, then set at 1.05%, one of the lowest in France, will be gradually reassessed in order to finance the line; it reached the rate of 1.65% in 2007.

The SEM of the TCSP is a local mixed economy company with a capital of €150 thousand, created in April 2006 on deliberation of 16 December 2005, which aims to ensure the project management of the work of the first tram line in Brest.

[12] In February 2007, the community council of Brest Métropole Océane voted to build the Froutven branch at the same time as the rest of the line, bringing its total length to nearly 14.5 km (9.0 mi), for an amount estimated in July 2006 at 298 million euros.

The site of the maintenance center is marked by shell demining operations from World War II when the city had been bombed for nearly four years.

[20] The line was inaugurated at 11 am, on 23 June 2012, at the end of the Rue de Siam, in front of the Recouvrance bridge, in the presence of the mayor François Cuillandre and the president of the Brittany region Jean-Yves Le Drian, marking the start of two days of festivities including a giant parade and a flashmob on the evening of 23 June.

This trilingualism is found in audio announcements, card headers, station names, timetables, ticket distributors and various technical information on board trains.

Line A serves, from west to east, the following places of attraction and monuments: On 29 June 2009, Brest métropole decided to allocate a budget of one million euros for the realization of works of art at the network, while there was already three existing installations.