Road Tunnels in Slovenia — Complete List by Length

• 54entries listed
• 8.02 kmlongest bore
• 1943–2013openings span
• 35.69 kmtotal length

The record table

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

How this table is compiled

Where one of these 52 lengths disagrees with an operator's own figure for Slovenia, the table keeps the published value and notes the difference instead of averaging the two. The 52 rows for Slovenia are ordered by length, not by date, so the 2013 opening sits well down the table without being any less current.

Lengths for Slovenia are recorded in metres which is how the operators publish them and why the shortest entry here reads as 15 m and not a rounded figure. The longest entry is 534.6 times the shortest and 27.4 times the median, which is the quickest measure of how uneven the table is.

A new scheme in Slovenia would have to beat 8.02 km to change the head of this table, and that is the figure worth rechecking when one opens. Eighth on the list is Š entvid at 1.49 km, which is where the table stops being about record holders and starts being about ordinary infrastructure.

1 of the 52 measured entries exceed five kilometres, and those are the ones that carry a full ventilation and escape regime. Laid end to end the entries on this page would run 35.69 km, which is a number with no engineering meaning but a useful sense of the scale of what is catalogued.

Dated entries run from 1943 to 2013, and the busiest decade is the 2000s with 31 recorded openings. The table on this page runs to 54 rows and records State, Tunnel, Length (m), Date of opening and Prov. for each of them, which is the shape the original compiler chose rather than one imposed here.

Reading the figures

The dated entries carry 20 distinct opening years across 70 years, and the median opening year is 2005. Read down the length (m) column, the 54 values run from 15 m to 8 019 m with a midpoint at 300 m; the spread rather than the maximum is what says how uneven this set is.

The ten longest average 2.42 km against 0.27 km for everything below them, and that ratio is the clearest thing this table says about the distribution. The tunnel column names 53 distinct entries on this page, Karavanke and Trojane among them, each traceable to the operator or administration record it was taken from.

Roughly 35 of the dated entries opened in this century, which is a rough measure of how much of the network is recent. The captions name 18 distinct places and structures — Blagovica, Lucija and Ankaran among them — and those names are the index into the length tables where each is recorded with its own figure.

The earliest dated entry is Ljubelj / Loibl, opened in 1943, and the most recent is Markovec in 2013. The material on this page is held in 23 captions rather than in running text, 203 words of it, each written against the image or row it belongs to by the compiler who put the page together.

They are not uniform: the fullest runs to 23 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. Ventilation and escape provision, not bore length, drive most of the cost on modern road tunnels in Slovenia.