Land & Marine Surveying have extensive experience of railway surveys. Wade Roest, our senior surveying technician, worked for the London Underground for two years while abroad. The tolerances for track setting-out are typically 5 times tighter than those for conventional road surveys, which means the correct equipment and methods are vital!
The improvement work that is being done on our rails can be done while the tracks are still in use, but this means safety and 3rd party interferences have to be factored into the contracts.
Our software suppliers 12d Solutions have recently added a special railways design module that will assist us enormously with performing all manner of railway surveys and redesign of track alignments as required. The module deals with all manner of design geometry, out of straightness surveys, offset targets used in field survey, control levels & positions and gauge variation on corners.
The information we collect can be integrated with the rail-provider’s dynamic data and used in the design process to improve the lines.
We hope to be a part of improving New Zealand’s railway system