8 juli 2012 kl 17:01
Om distanserna är korrekt uppmätta ska de ha en felmarginal. Den ena ska vara mellan 42195 och 42237 meter. Den andra ska vara mellan 40075 och 40115 meter.
Så här står det i IAAF:s regelbok för 2012-2013:
To prevent a course from being found to be short on future re-measurement, it is recommended that a “short course prevention factor” be built in when laying out the course. For bicycle measurements this factor should be 0.1% which means that each km on the course will have a “measured length” of 1001m.