The analysis of bus costs and revenues by time period. II. Methodology review

Abstract

In Part I of this paper the development of allocated and incremental cost and revenue techniques was described. Two costing methodologies, the British National Bus Company (NBC) model (CIPFA, 1974; Savage, 1988) and the Australian Adelaide model (R. Travers Morgan Pty., Ltd., 1980; Hill et al. 1984), have become predominant. In contrast, methodologies for dealing with revenues, particularly incremental measures, are in their infancy. Part II of the paper describes the state-of-the-art for these methods. This review is explicitly not meant as a cookbook of methodology, and the reader interested in these aspects is referred to the source literature. The paper concludes with a comparison of the NBC and Adelaide costing models, and comments on the areas of potential future research. In structuring the paper it is clear that the methodologies used to treat costs and revenues are quite distant. Therefore, they are treated separately here with costs being considered first. However, a problem emerges on deciding whether to treat allocated measures before incremental measures or vice-versa (I am indebted to Ian Wallis for pointing out this problem). The Adelaide model assumes that cost allocations flow from incremental analysis. The argument is that costs can be basically viewed as having three components. The first is costs that can be uniquely attributed to a route/time period. These would be costs that would be saved if that route/time period was completely withdrawn. This, in effect, is an incremental cost calculation. The second type of costs occur jointly between routes/time periods and could only be avoided if several or all routes/time periods were withdrawn, but not if only one service segment is withdrawn. The

Cite this work

No public copy is stored for this record, so only the metadata is cited.

Stored only when both papers are in the corpus — 10 citations exist upstream.

Papers that cite the same references — the relational fallback while embeddings are still backfilling.