Everything we know so far about Dubai Metro's underground Blue Line
whatson.ae
All the information on the proposed new Dubai Metro Line...

Looks like they plan to have the blue line extension ready to go in 2029 mentioned in the embedded video not the article.

The plan is to have 55% of the population within 800 meters of public transportation stations by 2040.

Blue line extension

A little bit old, but I always like to watch the video linked below: Youtube - Dubai Progress by MetroCucumber