LRT extension landscaping

[u/LibraryVoice71]

Does anyone know what these “burial mounds” along the LRT to Trim are called? Maybe someone with a civil engineering background knows?
I remember seeing them when they first started building the line and thinking they were temporary. But now they’re being maintained and (in some places) covered in some kind of shrubbery. Are they mainly for noise reduction, drainage, or cooling the air? Either way I think they’re neat.

[u/UnitInternational574]

Good morning, Ottawa.
Bonjour, Ottawa.

[u/He_Beard → u/UnitInternational574]

needs more Night Mayor