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Transport infrastructure structure in Italy: Apennine limestone ridge, twin concrete motorway portals with a projecting canopy, under a heavy dark sky, shot at 50mm, compressed. (AI-generated image) AI
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Italy

Tunnels and Viaducts on the S.S. 125 var, Cagliari to Tortoli

129 rows are rendered in total, so 44 of them carry a note or a blank where a length belongs and are shown without being counted. The middle half of the table runs from 0.1 km to 0.47 km, and that band is where most of the engineering on this page actually sits.

The 102 entries are grouped on the page under 20 headings — exit bari sardo sud (16), exit murtas (11), exit castiadas - solanas (9), exit quirra (8) and exit jerzu - lanusei - marina di gairo (8) — a classification the table carries as section breaks rather than as a column of its own.

The median entry measures 0.24 km, so half the table sits below that and half above, which is a better guide to the typical structure here than the headline figure. The shortest recorded entry is 0.06 km against 2.65 km at the top, a spread of 44.17x across the same table.

The record table

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

Tunnels and Viaducts on the S.S. 125 var, Cagliari to Tortoli
Tunnel / ViaductLengthNotes
Reg. Sardinia – Prov. CA - Connection S.S.554
Murtineddu2 591 m
Is Stellas212 m
Marapintau1 290 m
Murtaucci354 m
Is Canaleddus300 m
Bruncu su Campu600 m
Suergiu Mannu200 m
Exit Geremeas
Geremeas540 m
Baccu Peddis480 m
Baccu Mandara400 m
Arcu sa Ruxi120 m
Arcu sa Ruxi320 m
Arcu sa Porta2 650 m
Exit Castiadas - Solanas
Svincolo165 m
Costa Barbara81 m
Cungiau Mannu417 m
S'Arridellargiu140 m
Rio Castangia361 m
Rio Solanas725 m
Gutturu Frascu2 628 m
Rio Masone Murtas977 m
Gutturu Frascu60 m
Exit Villasimius - Castiadas
Rio Gutturu Frascu80 m
Corr'e Pruna80 m
Exit Olia Speciosa
Pispisa140 m
Zingargiu28 m
Rio Corr'e Pruna695 m
Rio Picocca474 m
Exit San Priamo
Ex SS 12530 m
Exit Burcei
Tremetzu65 m
Arrexini1 921 m
Cuilipaderi93 m
Arrusadulu93 m
Rio Mannu65 m
Exit Muravera - Villaputzu
Sovrappasso SS38740 m
Exit San Vito - Ballao
Flumendosa1 415 m
Sa Sperruma588 m
Sa Ruinosa492 m
Loi360 m
Pitzu Agus475 m
Exit Murtas
Murtas31 m
Fraccis 2126 m
Fraccis240 m
Marongiu285 m
Barcone690 m
Becciu240 m
Pezzo265 m
Pira Pisana35 m
Sa Tramatzu290 m
Farrù Intra295 m
Craitta Intra275 m
Exit Quirra
Quirra243 m
Su Pirastu243 m
Cucca130 m
Mannu163 m
Murgioni360 m
Ponte Antas31 m
Canna64 m
San Giorgio64 m
Exit San Giorgio
------------------Section San Giorgio - Tertenia: in project
Prov. CA - OG
Exit Tertenia Sud
Rio di Quirra210 m
Rio Sibiri100 m
Exit Tertenia
Rio Filixerru70 m
Rio di Quirra140 m
Exit Tertenia - Jerzu
Santu Perdu12 m
Donnuigaglia18 m
Su Crabriolu72 m
Su Cabriolu72 m
Exit Jerzu - Ulussai - Osini
Is Quaddazzonis1 390 m
Is Funtaneddas200 m
Viadotto12 m
Rio Is Funtaneddas216 m
Pranargia90 m
Rio Pranargia72 m
Is Carcuris I96 m
Exit Jerzu - Lanusei - Marina di Gairo
Is Carcuris II48 m
Is Carcuris III48 m
Rio Serrasomu105 m
Rio Donnixeddu30 m
Cardedu (Pardo)621 mExit Cardedu on viaduct
Genna Ortiga1 692 m
Gennalioni18 m
Grisoni108 m
Exit Bari Sardo Sud
Svincolo Bari Sardo30 m
Viadotto321 m
Viadotto144 m
Susanna Fenu117 m
Viadotto60 m
Viadotto48 m
Baccu Mula152 m
Viadotto312 m
Cuccureddu108 m
Viadotto60 m
Exit Bari Sardo Nord -Lanusei - Loceri; Viadotto (72 m) on ramp
Silimannu72 m
Riu Mannu310 m
Riu Bau de Giuanni510 m
Accu Nieddu270 mTemporary connection to S.S.125
S'Abba sa Murta480 m
Riu Baccu Arridela360 m
Exit Cea
Section Cea - Tortolì: under construction
Exit Tortolì - Lido di Orrì
Fuddeddu125 m
Exit Tortolì - Arbatax Porto - Lanusei
Viadotto30 m
Ferrovie Sarde90 m
Exit Arbatax Porto - Z.I.
Exit Girasole
Connection old S.S.125

How this table is compiled

The three longest entries alone account for 7.87 km of the 35.37 km on this page, which is 22 per cent of the total from 3 of 85 rows. The shorter half of the table totals 4.86 km against 30.51 km for the longer half, from the same number of rows.

The longest stands 0.02 km clear of the next longest, which is the margin to watch when a new scheme is announced. The captions name 13 distinct places and structures — Lanusei, Prov and Connection among them — and those names are the index into the length tables where each is recorded with its own figure.

Between the longest and the tenth-longest the drop is 1.93 km, which is the part of the table that changes when a single scheme opens. Where one of these 85 lengths disagrees with an operator's own figure for Italy, the table keeps the published value and notes the difference instead of averaging the two.

Lengths for Italy are recorded in metres which is how the operators publish them and why the shortest entry here reads as 60 m and not a rounded figure. The longest entry is 44.2 times the shortest and 11.0 times the median, which is the quickest measure of how uneven the table is.

A new scheme in Italy would have to beat 2.65 km to change the head of this table, and that is the figure worth rechecking when one opens. The eighth longest is Marapintau at 1.29 km, which is about where this record stops being about record holders and starts being about ordinary infrastructure.

Reading the figures

The tunnel / viaduct column names 92 distinct entries on this page, Murtineddu and Is Stellas among them, each traceable to the operator or administration record it was taken from. Swelling clays take up water and press on the invert for years after a tunnel opens, so some linings are designed to yield rather than resist.

Read down the length column, the 101 values run from 12 m to 2 650 m with a midpoint at 163 m; the spread rather than the maximum is what says how uneven this set is. A base tunnel trades a much greater length for a far lower summit altitude and a gentler ruling gradient.

The next two longest are Gutturu Frascu at 2.63 km and Murtineddu at 2.59 km. The material on this page is held in 5 captions rather than in running text, 37 words of it, each written against the image or row it belongs to by the compiler who put the page together.

Also recorded here are Genna Ortiga at 1.69 km and Flumendosa at 1.42 km. A tunnel list for Italy reads differently from a neighbouring country's: 0 of these 85 structures pass three kilometres, and the same journey time is bought with one long bore in one country and a dozen short ones in another.

77 entries fall below a kilometre, short enough that portals and approaches usually decided their cost more than the bore itself. Laid end to end the entries on this page would run 35.37 km, which is a number with no engineering meaning but a useful sense of the scale of what is catalogued.

Questions about Italy

What is the longest structure in Italy?

On the figures recorded here it is Arcu sa Porta, at 2.65 km. It is the longest of the 85 entries recorded here, measured by bore length rather than span, cost or construction difficulty.

How many structures are listed for Italy?

85 entries with a recorded length appear on this page, from 0.06 km at the short end to 2.65 km at the top, with the middle of the set around 0.24 km. The table renders 129 rows in total; the rest carry a note or a blank where a length belongs.

What is a typical length among the structures listed for Italy?

The median entry measures 0.24 km and the middle half of the table runs from 0.1 km to 0.47 km. The headline figure of 2.65 km is the outlier, not the norm, which is why the median is the more useful number when comparing one national list against another.

How close is the top of the Italy table?

The longest stands 0.02 km clear of the next entry, and 3 entries sit within ten per cent of it. A newly announced scheme therefore has to beat 2.65 km to displace Arcu sa Porta.

Other pages in this section

Cite this page

Tunnels and Viaducts on the S.S. 125 var, Cagliari to Tortoli. The World's Longest Tunnels. https://www.lotsberg.net/data/italia/SS125_var.html

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