Extensive scientific research work is underway for the future development of our roads – Car-Motor

A good road network is an essential condition for the country’s economic development. This theorem was known to the lords of the world empires at that time a few millennia ago. The economic centers of the former Roman Empire were connected by a road network of more than a hundred thousand km. With the current advanced division of labor, especially in planned socialist farming and in the age of extensive car traffic, permanently paved roads are even more important.
For a long time since the invention of the steam locomotive, weather-independent safe transport has been represented on land by rail alone. Even today, most bulk goods are transported by rail, but car transport is gradually gaining ground and playing an increasingly important role.
Pért and our Government have set the goal of including all settlements in the economic circulation of the country, which requires the large-scale development of our road network. Much of our existing roads are unsuitable for heavy car traffic, and many agricultural centers still do not have a paved road today.
Since the exploration of the mineral oil resources in Nagylengyel, one of the important raw materials of modern road construction has been available in large quantities in Hungary: bitumen, from which excellent flexible, dust-free paving can be made with appropriate technology.

Building modern roads is very expensive and requires serious financial sacrifices even from the richest countries. It is understandable, therefore, that we carry out extensive research work in order to implement the multi-billion forint Hungarian road construction program in the most economical way, because only a few percent savings can mean hundreds of millions.
On October 1 last year, Autó-Motor already reported on road resistance measurements at the Automobile Research Institute. Thus, our readers are already roughly informed about the course of the measurements. Since then, ATUKI has further developed the method of these tests and extended it to concrete pavements of various constructions, and this year also to asphalt roads. To increase the accuracy of the measurements, caravans consisting of a larger number of cars are organized, involving small and large cars, light and heavy trucks.
The caravan disembarks on the road section under test and prepares its accommodation near it, where a wandering repair shop is set up to ensure the accuracy of the measurements, so that even the smallest faults in the car can be rectified immediately. All vehicles participating in the measurement shall be pre-inspected and adjusted in the Institute’s laboratory and test section. This ensures the comparability of measurements taken at different times.
To date, the Institute has performed 4,660 measurements and evaluated their measurement data to many tens of thousands. Measurements have already been made on all major pavement types in the country, but so far only concrete and asphalt roads of different construction and condition have been studied in detail.

On an abandoned mountain road, a truck approaches a seismic evaluation head covered with a protective cover

It has already been known from foreign literature that each pavement represents a different operating cost for the cars advancing on it. The most favorable operating cost is on paved roads, medium operating costs occur on paved roads, while the fuel cost of a car traveling on asphalt roads is slightly higher, in contrast, repair costs are more favorable here. Macadam roads, especially if they are in poor condition, cause increased operating costs. However, literature data cannot be used directly because local conditions have a significant influence on numerical values. It is therefore necessary to fully map the country in this respect and determine the economics of the various roads on the basis of direct measurements.
Based on the many measurements so far, approximate multipliers are already available, which will be further refined in further measurements. Taking the operating costs on the paved roads as 1, the following multipliers have been obtained according to the findings so far:

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The Institute also measured the vibrations caused by cars on the road. These measurements are actually made with an earthquake measuring instrument, the so-called measured with a seismograph. This delicate and sensitive instrument detects even more distant forces and therefore this part of the measurements must be carried out on a section of road where there is no other traffic or significant movement over long distances. Therefore, the caravan visited deserted mountain roads to perform these measurements and placed the seismic head near the roadway using the seismic instrument built into a separate instrument car to draw the vibrations caused by the passing cars on the roadway. Based on these measurements, valuable data can be obtained for the planning of road construction as well as for the investigation of the strength issues of buildings near roadways.
Extremely interesting measurements will continue to be monitored and our readers will be informed about them from time to time.

P.L.

The caravan has a south rest

Source: Autó-Motor by www.automotor.hu.

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