Lebar sepur ganda
Pengukur tiga

Dalam situasi yang jarang terjadi, tiga alat pengukur yang berbeda dapat menyatu ke halaman rel dan jalur pengukur tiga diperlukan untuk memenuhi kebutuhan operasional stasiun pengukur jarak – paling sering di mana tidak ada cukup ruang untuk melakukan sebaliknya. Akan tetapi, konstruksi dan pengoperasian jalur triple-gauge dan persinyalannya melibatkan biaya dan gangguan yang sangat besar, dan dilakukan ketika tidak ada alternatif lain yang tersedia.
|  Gallery: Triple gauge (4 rails) |
| --- | --- |
 
1600 / 1435 / 1067 mm (5 ft 3 / 4 ft 81/2 / 3 ft 6 in). Turnout, 4-rail triple-gauge both ways, from the points end. : 1600 / 1435 / 1067 mm (5 ft 3 / 4 ft 81/2 / 3 ft 6 in). Turnout, 4-rail triple-gauge both ways, from the crossing end. 
 
1600 / 1435 / 1067 mm (5 ft 3 / 4 ft 81/2 / 3 ft 6 in). Three-rail dual-gauge track is joined by four-rail triple-gauge. : 1600 / 1435 / 1067mm (5 ft 3 / 4 ft 81/2 in / 3 ft 6 in). Standard-gauge car on 4-rail triple-gauge track. Narrow gauge track is two central rails; broad gauge is far left rail and second from right. 
  :  
1600 / 1435 / 1067 mm (5 ft 3 / 4 ft 81/2 / 3 ft 6 in). A six-rail triple-gauge turntable. It must always present the same positioning of rails at both ends, so all four rails must be symmetrical to the central axis. This is made possible only by reducing the profile of the middle rail on either side. : 1600 / 1435 / 1067 mm (5 ft 3 / 4 ft 81/2 / 3 ft 6 in). When the Sydney–Perth rail corridor was converted to standard gauge in the late 1960s, dual-gauge track in the Gladstone yard had to be replaced by all-new triple-gauge track. The result was an inordinately complex marshalling yard. 
Tabel berikut menunjukkan tempat-tempat di mana triple gauge diperlukan.
| Occurrences of triple gauge> Place | Occurrences of triple gauge> Narrowest gauge | Occurrences of triple gauge> Middle gauge | Occurrences of triple gauge> Broadest gauge | Occurrences of triple gauge> Notes |
| --- | --- | --- | --- | --- |
| Gladstone, South Australia | 1.067 mm (3 ft 6 in) | 1.435 mm (4 ft 8+1⁄2 in) | 1.600 mm (5 ft 3 in) | 1968–1983 (Some has been reconstructed at the National Railway Museum, Port Adelaide.) |
| Peterborough, South Australia | 1.067 mm (3 ft 6 in) | 1.435 mm (4 ft 8+1⁄2 in) | 1.600 mm (5 ft 3 in) | 1968–1983. (Some has been preserved at the Steamtown Heritage Rail Centre in Peterborough.) |
| Latour-de-Carol, France | 1.000 mm (3 ft 3+3⁄8 in) | 1.435 mm (4 ft 8+1⁄2 in) | 1.668 mm (5 ft 5+21⁄32 in) | Still in use[per kapan?] |
| Hendaye, France | 1.000 mm (3 ft 3+3⁄8 in) | 1.435 mm (4 ft 8+1⁄2 in) | 1.668 mm (5 ft 5+21⁄32 in) | Still in use[per kapan?] |
| Vynohradiv, Ukraine | 750 mm (2 ft 5+1⁄2 in) | 1.520 mm (4 ft 11+27⁄32 in) | 1.435 mm (4 ft 8+1⁄2 in) | Standard and broad gauge track is track plait[perlu disambiguasi] between Halmeu, Romania and Čierna nad Tisou, Slovakia, near Ukraine. The narrow-gauge track belongs to Borzhava narrow-gauge railway.[perlu disambiguasi] All still in use.[per kapan?] |
| Växjö, Sweden | 891 mm (2 ft 11+3⁄32 in) | 1.067 mm (3 ft 6 in) | 1.435 mm (4 ft 8+1⁄2 in) | Until 1974 or later |
| Montreux, Switzerland | 800 mm (2 ft 7+1⁄2 in) | 1.000 mm (3 ft 3+3⁄8 in) | 1.435 mm (4 ft 8+1⁄2 in) | Still in use[per kapan?] |
| Jenbach, Austria | 760 mm (2 ft 5+15⁄16 in) | 1.000 mm (3 ft 3+3⁄8 in) | 1.435 mm (4 ft 8+1⁄2 in) | Still in use[per kapan?] |
| Capolago, Switzerland | 800 mm (2 ft 7+1⁄2 in) | 1.000 mm (3 ft 3+3⁄8 in) | 1.435 mm (4 ft 8+1⁄2 in) | Metre gauge line closed in 1950 |
| Volos, Greece | 600 mm (1 ft 11+5⁄8 in) | 1.000 mm (3 ft 3+3⁄8 in) | 1.435 mm (4 ft 8+1⁄2 in) | 600 mm (1 ft 11+5⁄8 in) gauge closed in the 1970s, 1.000 mm (3 ft 3+3⁄8 in) gauge closed in 1998 |
| Toronto, Canada | 1.067 mm (3 ft 6 in) | 1.435 mm (4 ft 8+1⁄2 in) | 1.676 mm (5 ft 6 in) | Reported as impending in 1872. Subsequently converted to 1.435 mm (4 ft 8+1⁄2 in) gauge. |
| Gallery: Multi-gauge devices |
| --- | --- |
 
1600 / 1067 mm (5 ft 3 / 3 ft 6 in).  A dual-gauge centraliser that directs narrow-gauge livestock cars to the centre of the broad gauge so that they can be shunted without snagging the platforms. : 1600 / 1435 mm  (5 ft 3 / 4 ft 81/2 in). A simple dual-gauge common-rail change-over device. It directs standard-gauge rolling stock from the common rail in the left foreground to the right-hand rail in readiness for the turnout in the distance. 
  :  
1600 / 1435 / 1067 mm (5 ft 3 / 4 ft 81/2 / 3 ft 6 in). Triple-gauge common-rail change-over device: from one common rail (right foreground) to narrow gauge in the middle (in the distance). : 1600 / 1435 / 1067 mm (5 ft 3 / 4 ft 81/2 / 3 ft 6 in). A four-rail triple-gauge track that joins a three-rail dual-gauge track. The change-over device in the foreground directs standard-gauge rolling stock into a four-rail configuration.