Question juridique clé
Whether the refusal of the second third-party impleader was admissible for lack of sufficient substantiation and risk of excessive procedural complication.
Solution extraite
The refusal was upheld because the proposed alternative access routes were not made sufficiently plausible and would have unnecessarily complicated an already very large case.
Motifs extraits
The appellant did not show, in a substantiated and convincing manner, that the proposed routes were more suitable or less harmful; the cantonal court could also rely on the risk of paralysis of proceedings and on the requirements of procedural economy.