Tunnels and Viaducts on the A14 Motorway in Italy, by Kilometre Point

• 160entries listed
• 1.46 kmlongest bore
• 57.89 kmtotal length

The record table

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

How this table is compiled

The 258 entries are grouped on the page under 16 headings — exit porto sant'elpidio (131), exit montenero di bisaccia - vasto sud (29), exit ancona ovest (16), exit fano nord (10) and prov. bt - ba (10) — a classification the table carries as section breaks rather than as a column of its own.

The route table lists 160 structures with a recorded length, giving both carriageways where the two bores differ. The table on this page runs to 258 rows and records Tunnel / Viaduct, Direction Taranto, Direction Bologna, Notes and km for each of them, which is the shape the original compiler chose rather than one imposed here.

The three longest entries alone account for 4.05 km of the 57.89 km on this page, which is 7 per cent of the total from 3 of 160 rows. 80 entries sit above the median and 80 at or below it, so the table is evenly weighted and not clustered at one end.

This page records the structures catalogued along the A14 in Italy, in a tunnel almanac maintained at this address since the late 1990s. The captions name 33 distinct places and structures — Nord, Connection and Abruzzo 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 0.45 km, which is the part of the table that changes when a single scheme opens. Where one of these 160 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.

Reading the figures

Lengths for Italy are recorded in metres which is how the operators publish them and why the shortest entry here reads as 48 m and not a rounded figure. The longest entry is 30.4 times the shortest and 5.9 times the median, which is the quickest measure of how uneven the table is.

A new scheme in Italy would have to beat 1.46 km to change the head of this table, and that is the figure worth rechecking when one opens. The eighth longest is Moro at 1.13 km, which is about where this record stops being about record holders and starts being about ordinary infrastructure.

The shorter half of the table totals 12.07 km against 45.82 km for the longer half, from the same number of rows. Only 126 of the 258 rows carry anything in the km column, so that field describes a minority of this table and the rest of the rows are recorded without it.

The material on this page is held in 21 captions rather than in running text, 132 words of it, each written against the image or row it belongs to by the compiler who put the page together. The kilometre point is recorded for each structure on the A14, which is how the operator identifies it.

The next two longest are Alento at 1.31 km and Solagne at 1.26 km. A tunnel list for Italy reads differently from a neighbouring country's: 0 of these 160 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.