Road Tunnels in Türkiye — Complete List by Length

• 89entries listed
• 14.7 kmlongest bore
• 1976–2017openings span
• 105.58 kmtotal length

The record table

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

How this table is compiled

Where one of these 76 lengths disagrees with an operator's own figure for Türkiye, the table keeps the published value and notes the difference instead of averaging the two. The 76 rows for Türkiye are ordered by length, not by date, so the 2017 opening sits well down the table without being any less current.

Lengths for Türkiye are recorded in metres which is how the operators publish them and why the shortest entry here reads as 120 m and not a rounded figure. The longest entry is 122.5 times the shortest and 19.2 times the median, which is the quickest measure of how uneven the table is.

A new scheme in Türkiye would have to beat 14.7 km to change the head of this table, and that is the figure worth rechecking when one opens. The dated entries fall across 14 different years, which is a rough measure of whether this was a sustained programme or a handful of separate schemes.

4 of the 76 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 105.58 km, which is a number with no engineering meaning but a useful sense of the scale of what is catalogued.

The table below lists 89 entries with a recorded length, each giving a name, a length in metres and, where documented, the year of opening. The tunnel column names 89 distinct entries on this page, Mount Ovit and Kop Dagi II among them, each traceable to the operator or administration record it was taken from.

Reading the figures

Dated entries run from 1976 to 2017, and the busiest decade is the 2000s with 32 recorded openings. The table on this page runs to 89 rows and records Tunnel, Length (m), Date of opening, Province and Notes for each of them, which is the shape the original compiler chose rather than one imposed here.

Roughly 34 of the dated entries opened in this century, which is a rough measure of how much of the network is recent. Read down the province column, the 80 values run from 1 to 99 with a midpoint at 34; the spread rather than the maximum is what says how uneven this set is.

The longest stands 8.9 km clear of the next longest, which is the margin to watch when a new scheme is announced. The captions name 20 distinct places and structures — Motorway, Ankara and Persembe among them — and those names are the index into the length tables where each is recorded with its own figure.

The dated entries carry 14 distinct opening years across 41 years, and the median opening year is 2003. Read down the length (m) column, the 89 values run from 120 m to 14 700 m with a midpoint at 840 m; the spread rather than the maximum is what says how uneven this set is.

Eighth on the list is Bolu Dagi at 3.13 km, which is where the table stops being about record holders and starts being about ordinary infrastructure. The ten longest average 5.13 km against 0.82 km for everything below them, and that ratio is the clearest thing this table says about the distribution.