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• We evaluate the time-varying safety effects of speed cameras. • Speed cameras have significantly reduced the number of road accidents. • Safety effects of speed cameras experienced a sharp decrease after the installation. • Appropriate management is important to maintain the effectiveness of speed cameras. Introduction: Speed limit enforcement cameras provide an effective approach to reduce vehicle speeds and the number of road accidents. However, it is still unclear whether the safety effects of speed cameras show durability over long periods of time. This paper analyses how the effects of speed cameras on road accidents change over time. A total number of 771 camera sites and 4787 potential control sites are observed for a period of 18 years (1999–2016) across England. Method : Covariates such as road class, crash history, speed limit, and annual average daily traffic (AADT) are included in the data set. A difference in difference (DID) based propensity score matching (PSM) method is employed to select proper control sites and estimate the treatment effects. The safety effects of speed cameras are then evaluated from a long-term perspective. The post-treatment period is divided into four equal-length periods: early, medium 1 and 2, and late. Results and Conclusions : The results show that speed cameras have significantly reduced the number of road accidents near the camera sites. However, the effects vary across different time periods. The safety effects of speed cameras experienced a sharp decrease during the medium periods after an initial period of highly reduced accidents (medium 1: −53.1%, medium 2: −40.7%) and recovered slightly during the late period. In addition, to evaluate the criteria for selecting camera sites in the UK, we further investigated whether speed cameras at high risk sites have better safety performance. The results show that while safety effects at high risk camera sites also decreased during the medium periods, the reduction was smaller (medium 1: −20.8%, medium 2: −2.1%). Practical Applications : Appropriate road traffic regulations and management, as well as proper camera sites selection criterion, are important to maintain the effectiveness of speed cameras. [ABSTRACT FROM AUTHOR]

Background The red squirrel population in Great Britain has declined dramatically in recent decades, principally due to squirrelpox. Concern exists that red squirrels may become extinct nationally and, as there has been limited research in to diseases other than squirrelpox, this study aimed to identify additional causes of mortality. Results Post-mortem examinations on 163 red squirrels found dead on Isle of Wight (IoW) England, in Scotland and at other locations in Great Britain showed that 41.7% (n = 68) were killed by road traffic and 9.2% (n = 15) by predators, principally domestic cats and dogs. The overall male/female ratio was 1.08/1. Fleas were recorded on 34.9% of IoW squirrels and on 43.8% of Scottish squirrels but sucking lice and ixodid ticks were only seen on Scottish squirrels. Bacterial infections were significant, particularly in association with respiratory disease (n = 16); two squirrels died of Bordetella bronchiseptica bronchopneumonia. Cases of fatal exudative dermatitis (n = 5) associated with a lukM-positive clone of Staphylococcus aureus occurred only on the IoW. Toxoplasmosis (n = 12) was also confined to IoW where it was responsible for almost one sixth (15.6%) of all deaths. Hepatozoonosis was common, especially in IoW squirrels, but was not considered a primary cause of mortality. Hepatic capillariasis affected four IoW squirrels and one from Scotland. Fungal infections included oral candidiasis, adiaspiromycosis and pulmonary phaeohyphomycosis. Neoplastic conditions diagnosed were: pulmonary carcinoma, gastric spindle cell tumour, renal papillary adenoma and trichoepithelioma. Epidermal hyperplasia of unknown aetiology was seen in squirrels showing crusty lesions of the ear pinnae on IoW (n = 3) and Brownsea Island (n = 1), associated in two cases with cutaneous wart-like growths. Miscellaneous diagnoses included chylothorax, electrocution, intussusception, suspected cholecalciferol rodenticide poisoning and foetal death and mummification. No cases of squirrelpox were diagnosed. Conclusions Red squirrels in Britain suffer premature or unnatural mortality due to a number of conditions in addition to squirrelpox, many of which result, directly or indirectly, from human activities: road traffic trauma, pet predation, toxoplasmosis, trap injuries, rodenticide poisoning and electrocution accounted for 61% of all recorded mortality in this study. Red squirrels are also affected by several diseases of unknown aetiology which merit further research. [ABSTRACT FROM AUTHOR]

Abstract: This paper examines how complex transport projects are reported in the media using the Transport Innovation Fund bid for Greater Manchester as a case study. It demonstrates how projects are simplified and distorted in the media in a systematic way. Such distortion is explained by a scheme’s perceived newsworthiness, its complexity and the contemporary nature of news media production. The paper has implications for future research in this area and the implementation of sustainable transport policy. It urges transport professionals to both better understand, and engage directly with, the media if they are to maximise the benefits of efforts to shape travel behaviour. [Copyright &y& Elsevier]

Automobility lies at the heart of contemporary analysis of the social relations of mobility. Thus far, however, it lacks a history. This article seeks to rectify that omission by interrogating the road traffic accident crisis which afflicted Manchester in the early years of the Second World War. The article proposes a provisional chronology for automobility in twentieth-century Britain: a lengthy phase between 1920 and 1970, dominated by the interests of private motorists, and a modern sub-period between 1970 and the near present. The latter era witnessed a gradual, and then an increasingly rapid, movement towards meeting the needs of non-drivers. [ABSTRACT FROM AUTHOR]

The allocation of funds to police authorities in England and Wales is based on a formula which has been constructed to capture the key drivers of the main activities of the police: crime management, call management, public order and reassurance and traffic management. The formula was based on data from a 1995/96 survey by the Association of Chief Police Officers (ACPO), using data on police activity and recorded crime from 1990–92. In this article, the authors argue that the resulting allocation no longer reflects accurately the policing needs of London. [ABSTRACT FROM AUTHOR]