Influence of Vertical Alignment of Expressway Tunnel on Traffic Safety of Tunnel

With the consideration of frequent occurrence of traffic accidents on operating highway tunnels, the advancement of safety evaluation for highway tunnels in domestic and abroad are systematically summarized. Through the comprehensive analysis of infrastructure factors influencing on traffic safety of highway tunnels, safety checklists focusing on tunnel horizontal and vertical alignment, tunnel portal situation, pavement condition, ventilation and lighting facilities, traffic safety facilities are provided in qualitatively evaluating operating highway tunnels. Based on the concept of risk, risk assessment indices oriented in infrastructure factors, environmental factors and management factors for operation safety of expressway tunnels and standard highway tunnels are put forward. Quantitative evaluation methods based on indices architecture and the corresponding classification criteria for operation safety risk of tunnels are developed.

Download Full-text

Optical Quality Assessment of a Motorway Route

Proccedings of 10th International Conference "Environmental Engineering" ◽

10.3846/enviro.2017.142 ◽

2017 ◽

Author(s):

Rolandas Oginskas ◽

Lina Bertulienė ◽

Lina Juknevičiūtė-Žilinskienė ◽

Vilimas Gintalas ◽

Andrius Lenkauskas

Keyword(s):

Traffic Safety ◽

Optical Quality ◽

Proper Function ◽

Quality Level ◽

Vertical Alignment ◽

Change Rate ◽

Horizontal Alignment ◽

Spatial Design ◽

Different Seasons ◽

Standard Documents

A roads and highways are a complex structures consisting of different geometric and structural elements. Some of those elements influence the driving comfort, speed and traffic safety whereas others contribute to motorway durability and its proper function during different seasons of a year. The development of motorway construction or reconstruction designs either relies or is about to rely on the principles of spatial design of a motorway route. The application of the said principles improves optical quality of the route and leads to a correct comprehension of the motorway concerned. Nevertheless, the global as well as the European and the Lithuanian experience witnesses the cases of the emergence of unavoidable optical deformations in the solutions of motorway route design and the reason for that could be an unavailability of clear requirements set forth in the relevant standard documents in force in regard to coordination between the horizontal alignment and the vertical alignment of motorway elements. The missing coordination between the solutions of horizontal alignment and vertical alignment of the motorway turns to be the cause for lower levels of driving comfort and traffic safety, as an adequate prevision of the current situation driving such a motorway cannot always be possible. A parameter known as Curvature Change Rate of single curve (CCRs) is applied by numerous countries to assess the quality level of horizontal alignment of the existing or design motorway route. The present article presents a variation of the vertical alignment of a motorways in Lithuania relying on Curvature Change Rate of vertical curve (CCRv) parameter.

Download Full-text

Risk Attitudes and Behavior Among Norwegian Adolescents

European Psychologist ◽

10.1027/1016-9040.10.1.25 ◽

2005 ◽

Vol 10 (1) ◽

pp. 25-38 ◽

Cited By ~ 11

Author(s):

Hilde Iversen ◽

Torbjørn Rundmo ◽

Hroar Klempe

Keyword(s):

Public Health ◽

Traffic Safety ◽

Behavior Modification ◽

Health Programs ◽

Risk Attitudes ◽

Community Based ◽

Public Health Programs ◽

The Core ◽

And Behavior ◽

Attitudes And Behavior

Abstract. The core aim of the present study is to compare the effects of a safety campaign and a behavior modification program on traffic safety. As is the case in community-based health promotion, the present study's approach of the attitude campaign was based on active participation of the group of recipients. One of the reasons why many attitude campaigns conducted previously have failed may be that they have been society-based public health programs. Both the interventions were carried out simultaneously among students aged 18-19 years in two Norwegian high schools (n = 342). At the first high school the intervention was behavior modification, at the second school a community-based attitude campaign was carried out. Baseline and posttest data on attitudes toward traffic safety and self-reported risk behavior were collected. The results showed that there was a significant total effect of the interventions although the effect depended on the type of intervention. There were significant differences in attitude and behavior only in the sample where the attitude campaign was carried out and no significant changes were found in the group of recipients of behavior modification.

Download Full-text