Recently the Ministry of Transport and NZTA made an amendment to rule 41001/5, which specifies the dimensions that vahicles must comply with. The amendment generally relates to heavy vehicles such as trucks transporting frieght, but the Rule also includes a number of other changes that address issues raised by the transport industry or local authorities. The amendment Rule:
* extends the overall length allowed for certain types of ‘rigid bus’ to reflect the dimensions currently permitted for some buses under exemptions;
* allows buses to be fitted with bicycle racks, which may project beyond the allowed overall length or dimension of the vehicle;
"A bicycle rack fitted to the front of a bus... is not included in determining the overall length or forward distance of the bus, provided that the vehicle complies with the appliable swept path performance measures in Schedule 8"
See here for the CAN biblio entry
See here for more info on the NZTA site