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Aktualne trendy w zabezpieczaniu robót drogowych na drogach szybkiego ruchu

Słomiński Paweł

Magazyn Autostrady

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2022

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Nr 2

26--29

PL

Artykuł ma na celu wskazanie nowoczesnych sposobów zabezpieczenia robót na drogach szybkiego ruchu. Jest on wzbogacony o wieloletnie doświadczenie operatora autostrady A1 - firmy Intertoll Polska Sp. z o.o. Wiedza o tym, jak prawidłowo zaprojektować, wdrożyć i usunąć z drogi strefę robót może zapewnić bezpieczeństwo zarówno osobom pracującym na drodze, jak i jej użytkownikom oraz wdrożyć odpowiedni poziom i poczucie bezpieczeństwa.

EN

The article presents modern technical solutions related to securing the work zone on the concession section of the A1 Motorway. The effectiveness of the presented solutions has been tested many times by road users causing incidents in the work zone. Not a single person was hurt as a result of road accidents, and the application of these solutions probably saved the health or life of 4 motorway users.

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How does the value of time influence road user costs during work zone closures? A case study in El Paso, Texas, using simulation - based modeling methods

Shelton Jeffrey, Martin Peter M.

Journal of Sustainable Development of Transport and Logistics

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2021

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Vol. 6, No. 1

18--31

EN

It is becoming standard practice for many departments of transportation (DOTs) to use incentive/disincentive clauses (also known as road user costs) with contractors to stay on or ahead of schedule. These road user costs are clauses that DOTs use to calculate a monetary amount to encourage contractors to complete work prior to milestone dates and/or limit the time specified on the contract. The monetary amounts are typically vehicle operating costs and vehicle delay costs encumbered by highway users resulting from construction, maintenance, or rehabilitation activity. In this paper, we propose an innovative way of calculating these costs using varied values of time based on trip purpose and departure time. In addition, we use advanced pre-trip and en route traveler information to determine the influence it has on route choice. Several scenarios are modeled using an advanced, simulation-based dynamic traffic assignment model. The goal of this paper is to identify the governing factors that contribute to road use costs by determining different approaches to derive the value one places on a trip. The approach to this study is twofold: first several research methods were used to derive the value of time. Second, the use of advanced traveler information is introduced to determine if it plays a critical role in route choice. The proposed methodology shows differences in road user cost calculations. Which approach would be more receptive to a contractor while proposing roadway construction? A case study of a roadway construction project in El Paso, Texas, is used to compare different approaches to calculate road user costs.

3

Optical Properties of Plane and Convex Mirrors: Investigation of Mirror Use to Enhance Construction Flagger Safety

Stevens Jr E., Cohen M., Spielholz P.

International Journal of Occupational Safety and Ergonomics

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2009

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Vol. 15, No. 1

89--100

EN

Legislation and product development in the USA has prompted an interest in mirror-use by traffic flaggers to improve awareness of vehicles approaching from behind. Helmet- and flagpole-mounted configurations were studied using a graphical approach with field verification studies by comparing fields of view, object magnifications, and human factors considerations. Plane and convex mirrors with different radii of curvature were investigated. Results found image formation on helmet-mounted convex mirrors occurs too close to the mirror. A 0.038 m helmet-mounted plane mirror performed similarly to a 0.076 m diameter, 0.508 m radius of curvature convex mirror. Fields of view and image information between helmet-mounted plane mirrors and flagpole-mounted convex mirrors were compared. Issues of image perception, practical use, and attention were identified; they pose serious issues for use as a primary safety device. Additional investigation is needed to determine the requirements and applicability of mirror-use for flagging in work zones.