Urban performance at different boundaries in England and Wales through the settlement scaling theory

The relationship between transport-led agglomeration and economic performance is evaluated in an English and Welsh context. We examine the effects of scale, i.e., inter- versus intra-city mobility infrastructure, on urban size–cost performance. An additional contribution of this paper lies in its use of power-law scaling models of urban systems, enabling an assessment of optimality in the trade-off between economic output and mobility costs accounting for ease of access within cities coupled with their built density. Findings suggest economic underperformance coincides with inadequate mobility at both inter- and intra-city scales, while overperformance is accompanied by overgrown urbanized area and escalating mobility costs.