Under the Ma-20: Vision with a Catch — How Realistic Is Palma's Green Ring?
The Real Cost Factors Behind a Ma-20 Tunnel
A Ma-20 tunnel would require major spending on construction, ventilation, drainage, safety systems and long-term upkeep.

Answer
What are the main costs of building a tunnel under the Ma-20 in Palma?
More questions on this topic
Related follow-up questions from the same article, collected in one place.
Could Palma really put the Ma-20 underground and turn it into a green ring?
Technically possible, but financially and politically difficult.
Would tunneling the Ma-20 in Mallorca reduce traffic congestion?
No, not unless Palma also reduces car dependence.
What needs to be included in a serious feasibility study for Palma’s green ring?
It should cover traffic, geology, costs and social effects.
How would residents near the Ma-20 in Palma be affected during construction?
Nearby residents would likely face noise, dust and disruption during works.
What kind of transport alternatives would Palma need if the Ma-20 is tunnelled?
Better buses, park-and-ride and traffic management would be essential.
What would happen to the land above the Ma-20 tunnel in Palma?
It could become public space, but only if Palma protects it with clear rules.
Is EU funding a realistic option for a Ma-20 project in Mallorca?
EU funding could help, but it would not cover the full cost.
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