nr 7-8/2021 r.

DROGOWNICTWO 7-8/2021

 

CONTENTS

Piotr Burnos, Janusz Gajda, Ryszard Sroka, Monika Wasilewska, Cezary Dołęga: Precise Weigh-In-Motion systems for weighing vehicles         191

Krzysztof Kaperczak, Barbara Rymsza: Pedestrian crossings on speed humps (raised pedestrian crossings) – access problems for people in wheelchairs         199

Witold Zapaśnik: Innovative solutions used in road contracts implemented by GDDKiA .............................................................         204

FROM FOREIGN PRESS – Sylvia Uehlendahl, Ralf Zeiler: High-quality recycling of asphalt granulates in city of Dortmunt (by Marek Danowski) .....         213

ROAD ENGINEERING HISTORY – Wiesław Pomykała: Border bridges of the Lublin region over the Bug river .....................................         218

Marek Skowron: The beginnings of mechanical hardening of road pavements in Poland .............................................................         226

ROAD ENGINEERING HISTORY: Elaboration on the basis of information entitled Safety First! (by Maciej Radzikowski) ......................................         231

 

ABSTRACTS

 

Piotr Burnos, Janusz Gajda, Ryszard Sroka, Monika Wasilewska, Cezary Dołęga: Precise Weigh-In-Motion systems for weighing vehicles. “Drogownictwo”, vol. LXXVI, No. 7–8, 2021, pp. 191–198

Weigh-In-Motion systems (WIM) are sensitive to many disturbing factors including climatic ones. As a result the weighing accuracy changes over the time. This feature makes it difficult or even impossible to use these systems for direct enforcement of overloaded vehicles. The article presents practical aspects related to the identification of disturbing factors and methods of improving the accuracy of weighing results.

Keywords: Weigh-in-Motion, dynamic weighing of vehicles.

Editors: Maciej Radzikowski, Marek Danowski

 

Krzysztof Kaperczak, Barbara Rymsza: Pedestrian crossings on speed humps (raised pedestrian crossings) – access problems for people in wheelchairs. “Drogownictwo”, vol. LXXVI, No. 7–8, 2021, pp. 199–203

The paper is devoted to the problem of wheelchair users moving along raised pedestrian crossings. First the legal status of creating those crossings was presented and then 3 examples were given where depending on the drainage method used the crossing design impacts the way people in wheelchairs can move.

Keywords: pedestrian crossings; drainage; disabled.

Editor: Tadeusz Suwara

 

Witold Zapaśnik: Innovative solutions used in road contracts implemented by GDDKiA. “Drogownictwo”, vol. LXXVI, No. 7–8, 2021, pp. 204–212

The article discusses the innovative materials and technologies, implemented and appliedlast years more and more widely on infrastructure contracts, being executed on national road network, governed by the General Directorate for National Roads and Motorways (GDDKiA).

In the first part of the article, the formulas are discussed according to which the GDDKiA’s infrastructure contracts are presently executed and in which way application of innovative solutions is regulated in the inner documents of GDDKiA.

In the second part of the article, the examples of GDDKiA activities are given, dealing with implementation of innovative solutions and new technologies on presently executed contracts and with division into construction and maintenance of concrete road pavements, concrete engineering structuresand construction and maintenance of asphalt road pavements.

Key words: innovations, individual design, PFU, white-topping, composite reinforcement, grinding and grooving, continuous reinforcement,structures with concrete deck/pavement slabs, AMG mixtures, mixtures with reclaimed asphalt, asphalt long-life pavement, SMA JENA HIMA pavement.

Editor: Maciej Radzikowski

 

Wiesław Pomykała: Border bridges of the Lublin region over the Bug river. “Drogownictwo”, vol. LXXVI, No. 7–8, 2021, pp. 218–225

The paper describes selected bridge crossings built over the Bug river, which currently function as border bridges. As a result of decisions made by the three superpowers at the conferences in Tehran, Yalta and Potsdam, after the end of World War II more than half of Poland became part of the USSR. The eastern border of Poland ran, among others, through the middle section of the Bug River. After the war damage, there were seven damaged road bridges on this section of the river, all of wooden construction. These were bridges in Pratulin, Terespol, Sławatycze, Koden, Zosin, Dorohusk and Włodawa. In the paper the author described a number of events concerning the reconstruction of border bridges and their builders, which, as a result of the parties’ agreement, Poland took over to maintain, namely the bridges in Terespol, Zosin and Dorohusk.

Keywords: border bridges over Bug river in Lublin region, bridge builders in Lublin region, Lublin region, wooden bridges, bridge failures.

Editor: Adam Kaszyński

 

Marek Skowron: The beginnings of mechanical hardening of road pavements in Poland. “Drogownictwo”, vol. LXXVI, No. 7–8, 2021, pp. 226–230

This paper presents the development of mechanical hardening of road pavement in Poland. Selected types of horse and steam powered road rollers are described. Details of the construction of the commonly used Majewski system horse roller are given. The first attempts to use steam rollers were also described.

Keywords: road pavement, hardening, road rollers, history.

Editor: Jan Król