This paper analyzes the accuracy of cost estimates for Swedish transport infrastructure projects 2004-2022, discusses causes of cost overruns, and suggests remedies. Cost estimates for all projects in the national investment plans 2010-2022 are tracked from early planning to completion. Final...

When benefits of proposed infrastructure investments are forecasted, residential location is usually treated as fixed, since very few operational transport models are able to forecast residential relocation. It has been argued that this may constitute a source of serious error or bias when...

This chapter explains the basic ideas, concept and theories of congestion pricing, and then focuses on how the theoretical idea can be applied in practice. The first section gives a brief overview of the major operational urban congestion pricing schemes. The second section gives a summary of...

This paper addresses the problem of measuring the welfare benefits of a transport improvement. We formulate and analyze a rich spatial model that allows for spillovers, matching and income tax, in a setting with multiple work and residential locations and very general worker heterogeneity. The...

In order to incorporate travel time variability in appraisal, methods are needed to predict effects on travel time variability of investments and polity measures. The present study is a first step towards developing such a method. Using data from Stockholm’s automatic camera system for travel...

A common argument against car use taxes, such as congestion charges and fuel taxes, is that they hurt poor groups disproportionately. This chapter discusses this argument, explains methodological issues in distributional analyses and summarizes typical empirical findings. How distributional...

This paper compares the performance of several models forecasting travel time variability for road traffic, using before/after data from the introduction of the Stockholm congestion charges. Models are estimated on before-data, and the models’ forecasts for the after-situation are compared to...

När den statliga infrastrukturplaneringsprocessen gjordes om för ett drygt decennium sedan ville man bland annat komma till rätta med kostnadsöverskridanden, långa ledtider och bristande fokus på kostnadseffektivitet. Många av dessa problem kvarstår dock. I denna uppsats ges ett antal...

A number of highly cited papers by Flyvbjerg and associates have shown that ex ante infrastructure appraisals tend to be overly optimistic. Ex post evaluations indicate a bias where investment costs are higher and benefits lower on average than predicted ex ante. These authors argue that the...

This paper addresses the problem of measuring the welfare benefits of a transport improvement. We formulate and analyze a rich spatial model that allows for spillovers, matching and income tax, in a setting with multiple work and residential locations and very general worker heterogeneity. The...