The tight-knit line: 4
The line linking Porte de Clignancourt to Mairie de Montrouge is not only the second busiest in the network, it also serves four of the capital's biggest stations: Châtelet-Les Halles (doubled, phew!), Gare du Nord, Montparnasse and Gare de l'Est. All without air conditioning, and on the slowest and most frequently disrupted line on the entire network. So, unless you're a stickler for tight quarters and the smell of sweat from 8am, this line will make you break out in a cold sweat.
The line from hell: 13
Anyone who has ever travelled this line linking Asnières to Châtillon-Montrouge knows that the gates of Hell are not far away. Line 13 isn't the busiest, yet at peak times, the trains have a 116% occupancy rate. Add to this the numerous disruptions that occur almost daily on this line, and the age of its trains, and you have the worst line on the metro (on a par with line 4, in our opinion).
The boredom line: 8
In absolute terms, we like line 8. It takes us all over Paris, it's not too busy, it doesn't carry too many tourist suitcases... In short, it's a cool line. Except that it's a damn long one. If you get on at La Motte-Piquet-Grenelle and get off at Reuilly-Diderot, for example, you can be sure you'll look up half a dozen times and think you've reached your destination before you actually get off. And you won't even have got halfway down the 38-station line.
The cardboard line: 1
Why put line 1 in this ranking when it's punctual, has clean, new trains and serves a lot of nice places? Because line 1 is the first to go when something happens in Paris. A demonstration? Stations closed. Floods? Stations closed. A sporting event? Stations closed. A commemoration? Stations closed. Line 1 is the good friend who has everything to help us, but never answers when we need her.
The sauna line: 6
Line 6 is the walking line par excellence: most of it is outdoors, offering lovely views over Paris and serving many of the Left Bank's tourist attractions. Except that in summer, these very pleasant features turn it into a sauna in the making: with no air-conditioning, it's in direct sunlight for a large part of its route, and therefore suffers the full force of the heat wave. Parisians working in the west of the city and the thousands of tourists who use it to get to the Eiffel Tower or the Trocadero add to the already warm atmosphere.
To finish on an optimistic note, the best line: 14
Cool, fast, with wide platforms and almost never disrupted, line 14, the most recent in the network, restores our faith in the RATP. Line 14, we love you.
C.R
From article: https://vivreparis.fr/transports-les-pires-lignes-du-metro-parisien/
