New Paris metro line: from 2026, it will run on France’s longest viaduct, almost 7 km long

In Paris, the idea of a new metro line is resurfacing. From now on, the subject will be on the lips of commuters and local residents alike. The project is advancing in stages, with no hasty promises.

Why this project is back on the table

The saturation of certain routes is a daily burden. For example, many residents of Seine-Saint-Denis are calling for more direct connections. What’s more, employment areas are moving east and north.

Lines 15, 16, 17 and 18 arrive in phases. As a result, better-thought-out connections could relieve some of these historic lines.

Targeted routes and everyday needs

Several routes are being tested in the studies, but no final decision has yet been taken. However, the objective remains clear: to link districts that are currently poorly connected. The new metro line would target short, regular journeys.

“A line that connects jobs and neighborhoods, without detours.”

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Opportunity studies compare journey times, costs and urban impacts.Île-de-France Mobilités teams are consulting with local authorities to refine priorities. At this stage, the new metro line remains a scenario to be investigated.

• Opportunity studies underway and shared criteria
• Players involved: Île-de-France Mobilités, RATP, Société du Grand Paris
• Routes under study, no fixed timetable
• Public consultation to be announced
• Possible connections with lines 15 to 18 and 14

Timetable, players and financing

According to public information, the lead body is Île-de-France Mobilités. RATP and Société du Grand Paris are contributing their network and structures expertise. No official timetable has yet been set.

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As far as the budget is concerned, estimates are cautious and subject to change. Consequently, any commitment will depend on the results of studies and regional arbitration. The new metro line cannot go ahead without solid financial guarantees.

What impact will this have on users and neighborhoods?

The promise, if confirmed, will affect journey times. This would make suburb-to-suburb connections easier to understand. A new metro line would also reduce pressure on saturated routes.

On the other hand, construction sites are likely to disrupt the road network and some shops. Local consultation will also be used to deal with sensitive points. In short, fine, transparent coordination is the key to success.

How to get organized in the meantime

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In the meantime, it’s best to make flexible connections on existing routes. For example, several streetcar and bus lines remain reliable at peak times. A new metro line is on the way, but everyone can already optimize their route.

Stay tuned for further study stages and public meetings in the coming weeks and months. From now on, every opinion will feed into the decision on the new metro line. As a result, the best option will emerge from the ground and from usage.

• new metro line