Road Tunnels in Andorra — Complete List by Length

• 6entries listed
• 2.92 kmlongest bore
• 2002–2012openings span
• 8.11 kmtotal length

The record table

How this archive measures: lengths, bores, dates and ordering

How this table is compiled

Second and third place go to Envalira at 2.88 km and Pont Pla at 1.27 km. Read down the length (m) column, the 6 values run from 150 m to 2 922 m with a midpoint at 934 m; the spread rather than the maximum is what says how uneven this set is.

Dated entries run from 2002 to 2012, and the busiest decade is the 2000s with 2 recorded openings. The material on this page is held in 4 captions rather than in running text, 50 words of it, each written against the image or row it belongs to by the compiler who put the page together.

Roughly 4 of the dated entries opened in this century, which is a rough measure of how much of the network is recent. The captions name 6 distinct places and structures — Massana, France and Andorra among them — and those names are the index into the length tables where each is recorded with its own figure.

Where one of these 6 lengths disagrees with an operator's own figure for Andorra, the table keeps the published value and notes the difference instead of averaging the two. The 6 rows for Andorra are ordered by length, not by date, so the 2012 opening sits well down the table without being any less current.

Lengths for Andorra are recorded in metres which is how the operators publish them and why the shortest entry here reads as 150 m and not a rounded figure. The longest entry is 19.5 times the shortest and 3.1 times the median, which is the quickest measure of how uneven the table is.

Reading the figures

Dates for Andorra refer to opening to traffic, not breakthrough, so the 2002 entry was under construction for some years before that. Laid end to end the entries on this page would run 8.11 km, which is a number with no engineering meaning but a useful sense of the scale of what is catalogued.

A new scheme in Andorra would have to beat 2.92 km to change the head of this table, and that is the figure worth rechecking when one opens. Squeezing ground closes on a bore faster than it can be lined, and it is the condition that has delayed more alpine schemes than any other.

The earliest dated entry is Envalira, opened in 2002, and the most recent is Dos Valires in 2012. They are not uniform: the fullest runs to 27 words and the briefest to 6, and on a page of this kind the long ones are where the explanation lives — the caption carries what the picture cannot.

5 of the 6 rows carry an entry in the notes column — 83 per cent of the table — and that column is where the qualifications live: tube counts, closures, boundaries and the reason a figure reads the way it does. Toll arrangements are excluded here, because they change far more often than the structures do.

The table below lists 6 entries with a recorded length, each giving a name, a length in metres and, where documented, the year of opening. The tunnel (tunel) column names 6 distinct entries on this page, Dos Valires and Envalira among them, each traceable to the operator or administration record it was taken from.