Other than an issue with the construction permit, the construction period progressed without significant issues. The key construction contractors during the construction period were Heijmans for the road infrastructure, Franki for the tram depot and Frateur de Pourcq for the rail infrastructure.
One issue that occurred during construction was a situation in which the Project Company's construction permit was revoked on 15 May 2011 because of public objections to the proposed developments. On 27 September 2011, a new permit was issued with some additional conditions. The equity position of De Lijn proved beneficial when the approval was revoked by the court. Together with the private equity investors in the Project Company, De Lijn worked as a partner to resolve the issue. Although construction works were suspended on the light rail section affected by the revoked permit, other works subject to different permits continued. In the end, the delay of four months did not have any material impact on the overall completion and timing of the project.
The project's construction progress was monitored by an independent certifier until completion was achieved.