Making way for the car: Minimum parking requirements and Porirua City centre
Minimum parking requirements mandate that each new development provides enough parking to ensure ample provision at the time of peak demand. This approach tends to oversupply parking above the optimal level, and by bundling parking into the development costs, ensures that parking is free to the user. As a result, land-use and transport decisions are distorted.
A case study of Porirua central business district was undertaken by Angus Hulme-Moir to investigate the use of minimum parking requirements in the New Zealand context, and to assess their impacts on transport and land-use patterns. Findings indicate that minimum parking requirements tend to oversupply parking relative to weekly mean and peak occupancies. Land use mapping found that 24% of CBD land is allocated to car parking and minimum parking requirements were shown to contribute to dispersed development patterns. Stand choice data and a cost recovery model for car parking highlight how free and ample car parking provision favours car driving and has distortionary impacts on travel decisions.