nr 3/2020 r.

DROGOWNICTWO 3/2020

 

CONTENTS

Przemysław Górnaś, Andrzej Pożarycki: Cost functions in the backcalculation procedure based on measurement results of the road pavement deflections                      67

Maciej Radzikowski, Grzegorz Foryś: Diagnostics of pavement condition and selected elements of the road ................................           73

SITK ACTIVITY: Ceremonial unveiling of the board with the image of Ernest Malinowski (by Bogdan Kublin) .....................................           89

Jakub Maśkiewicz: Method for general GPR 2020 traffic census on national roads      ........................................................................................... 91

FROM GDDKIA SERVIS (selected by TS):

Programme for construction of 100 road bypasses ....           96

Next ZRID decision for the Mazovian section S7 ...... IV p.cvr

 

ABSTRACTS

 

Przemysław Górnaś, Andrzej Pożarycki: Cost functions in the backcalculation procedure based on measurement results of the road pavement deflections. “Drogownictwo”, vol. LXXV, No. 3, 2020, pp. 67–72

The paper discusses the systematic assessment of the properties of selected cost functions used for backcalculation of road pavement layers models. The calculation results for theoretical models were verified with the results of calculations based on data from measurements of pavement deflections in situ. The analysis limited to the classic measure of differentiation shows that the most stable values of standard deviations in the set of results obtained based on the inverse calculation procedure returns the AVCF (Area Value with Correction Factor) criterion.

Keywords: deflectometer FWD, backcalculation, cost functions.

 

Maciej Radzikowski, Grzegorz Foryś: Diagnostics of pavement condition and selected elements of the road. “Drogownictwo”, vol. LXXV, No. 3, 2020, pp. 73–89

In 2019, the guidelines for the diagnosis of pavement condition were updated. The main submissions accepted for the update include extending the records concerning the inventory and evaluation of concrete pavement and selected elements of the road (unpaved shoulders and drainage elements), as well as systematizing the principles of performing measurements of pavement structures. The paper presents only the most important fragments of road network diagnostics used in GDDKiA. In particular, it refers to the purpose of pavement diagnostics, technical features of the pavement and methods of its identification, and the principles of determining repair procedures. The result of the diagnostics is the classification of repair needs on a section of lane, carriageway, road, route, road network.

Keywords: pavement condition, diagnostics, extension, guidelines.

 

Jakub Maśkiewicz: Method for general GPR 2020 traffic census on national roads. “Drogownictwo”, vol. LXXV, No. 3, 2020, pp. 91–95

General GPR traffic census have been carried out in Poland at 5-year intervals since 1965 and constitute the basic source of information on traffic on the road network. In 2020 measurements, the national road network of approx. 18,000 km has been divided into approx. 2300 measuring sections of homogeneous character in terms of traffic, on which measuring points have been determined in authoritative locations. Four types of measurements are used, automatic, semi-automatic, video recording and manual. Four types of measurements are used, automatic, semi-automatic, video recording and manual.

Keywords: road traffic, general census 2020, method.