[6] The project's Environmental Impact Assessment (EIA) report was produced by C. F. Moller; it was estimated that establishing the light rail network would result in annual energy savings of 47 gigawatts and reduce carbon dioxide emissions by 73 tonnes (161,000 lb) during each year of operation.

[11] Various different approaches for the network were being considered at one stage, including the full electrification of the route, the procurement of a combination of 750 V DC trams and electro-diesel tram-trains.

[6] By late 2012, it had already been decided that Germany's BOStrab light rail regulations would be applied to the tentative network, while Lloyd's Register was appointed to serve as the independent safety assessor.

[6] As a consequence, the Aarhus Letbane joint venture between the local municipality, the Ministry of Transport and the Midtjylland region was formally established to promote and further the project during August 2012.

Stadler supplied the rolling stock for the line while Ansaldo STS provided the associated infrastructure, such as the tracks, signalling systems, control centre, and maintenance facility.

[6] The line forms a loop spanning across Aarhus' city centre, linking into the existing regional railways running to Odder in the south and Grenaa in the northeast; to facilitate such operations, the existing Odderbanen railway from Aarhus to Odder and Grenaabanen to Grenaa has been adapted to accommodate tram-train services.

Furthermore, the heavy rail station at Aarhus, along with existing park and ride facilities near major stops along the route have been refurbished.

In the following year, both the Randers Way and Nørrebro Street had to be reduced in width in order to allocate space between the lanes for the installation of the new double-track line.

On 20 December 2017, it was announced that approval for the new lines had finally been issued, allowing for services on the central tram section to commence during the following day.

In June of 2024, the local Århus Stiftstidende newspaper released the official passenger numbers for all stations on Aarhus Letbane for the first quarter of 2024[26]