Miles/Chains/Yards/Metres
1 mile = 80 chains/1760 yards/1600 metres
¾ mile = 60 chains/1320 yards/1200 metres
½ mile = 40 chains/880 yards/800 metres
¼ mile = 20 chains/440 yards/400 metres
1 chain = 22 yards
Track Measurements
Standard gauge (distance across the 4ft) = 1435mm/4ft 8 ½
Standard 6 foot (outside edge to outside edge of running rails) = 1830mm/6 feet
Standard 6 foot (inside running edge to inside running edge) = 1970mm
Standard rail length of jointed track = 60 feet/20 yards/18.2 metres
Normal sleeper spacing between 650mm/25 inches and 760mm/30 inches
(Depends on type of sleeper, concrete further than wood)
Rail types are either Flat Bottom or Bullhead
Trains
SLU (Standard Length Unit) = 6.5 metres/7 yards/21 feet
Track Safety
On or near the line (Trackside) = 3 metres/10 feet
On or near the line (platform) = 1.25 metres/4 feet
Position of safety (linespeed 100 mph or less) = 1.25 metres/4 feet
Position of safety (linespeed 100-125 mph) = 2 metres/6 feet 6inches.
Overhead Line Equipment (Live OLE) = 2.75 metre/9 feet
Rigid temporary fencing = 1.25 metres/4 feet from nearest open line
Netting/tape temporary fencing (40mph or less) = 1.25 metres/4 feet
Netting/tape temporary fencing (41mph or more) = 2 metres/6 feet 6 inches
Gaps every 40 metres whilst unattended
Site Warden distance = 2 metres/6 feet 6 inches (at any speed)