Abstract
In Lithuania, the efforts are made to ensure the conditions of safe, comfortable and fast passenger and freight transportation on Lithuanian roads, satisfying geometric characteristics of their particular categories and the specified requirements to their pavement. The considered characteristics of pavement include its roughness, strength and the admissible rut depth and destruction level. Rest and Service Areas (RSAs) are usually set up at the roadside. The paper presents a description of the conditions specified for the movement of motor vehicles on the major Lithuanian roads in the seasons of warm weather and a Classification Model (CM) of the required conditions. It also provides the results of the evaluation of actual Travel Conditions (TCs) on the main Lithuanian roads by using the developed model. The obtained results show that in 2016 on the considered highways were good and very good, except for road A9, where the TCs were satisfactory. It is demonstrated that the distances between RSAs comply with the recommended distances. It is also shown that roughness of pavement and strength of the Structure of the Pavement (SP) depend on the destruction level of pavement. The values of such pavement parameters as roughness, rut depth and destruction level, which should not be exceeded because they help to ensure either comfortable or good TCs on Lithuanian highways, are given. The suggested model of road TCs can be used for determining the quality of TCs on highways.
Highlights
In any country, roads are important routes for vehicles, allowing people to move freely at a high speed in the desired directions and to reach the place of destination
The programme for maintenance and development of the main motorways of Lithuanian Republic for 2002...2015, as well as the programme developed for the period until 2020, specify the requirement to largely improve the reliability of road transport infrastructure
The analysis of the results has shown that using the suggested Classification Model (CM) (Figure 1) and the developed algorithm (Figure 2) in the research allows for obtaining the objective values of the criteria describing Travel Conditions (TCs) on highways
Summary
Roads are important routes for vehicles, allowing people to move freely at a high speed in the desired directions and to reach the place of destination. The parameters corresponding to the road category, which are guaranteed, are as follows: the falling gradients of longitudinal ii and transverse is road profiles and the lengths of the radii of the horizontal curves in the plan Rp, as well as the convex Ris and the concave Rįg curves in the longitudinal profile (Samuchovienė et al 2013) Nonstructural factors, such as surface distresses and ride quality, have been commonly used as the main indicators of in-service pavement conditions. The specifications define and the investigations consider TCs on motor roads from various perspectives (by assessing the road category and strength of its pavement, the factors ensuring a good state of the road, the medical services provided by the roads, the aesthetic perception of roadside landscape by the travellers, etc.). The aim of the present work is the development of a Classification Model (CM) of the actual automobile TCs on Lithuanian roads in the warm weather seasons and its applicability assessment, as well as the evaluation of TCs on the highways A1, A2, A9 and A11 by using the developed model
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
