User:Tabletop/Gauge

Africa

1 and 3 ft 6 in (1,067 mm) gauges are too close to allow three-rail dual gauge.	1 and 3 ft 6 in (1,067 mm) gauges can be used together, with four-rail dual gauge - note the third (useless) 1267 mm gauge.	1 and 3 ft 6 in (1,067 mm) gauges can be used together with four-rail dual gauge, with bonus 1435 mm standard gauge.

Africa is particularly affected by gauge problems, where railways of different gauges in adjacent countries meet.

Gauge rationalisation in Africa is facilitated since four-rail dual gauge of 1 and 3 ft 6 in (1,067 mm) contains a hidden gauge, which can be made to be standard gauge 1435. The four-rail system reuses and doubles the effective strength of the old light rails, which might otherwise have only a low value reuse as fenceposts.