Initial assessment of the legitimacy of limiting the maximum permissible speed on highways and motorways based on tests in real traffic conditions

Abstract

The reduction of emissions of harmful exhaust gases is one of the main aspects in broadly understood automotive sector. Representatives of the European Union are encouraging vehicle manufacturers to comply with increasingly stringent standards related to the emission of harmful substances in passenger cars. From 2020, the new standard for CO, HC and NOX road emissions from these vehicles will come into force. It also assumes average CO2 emissions from fleets producer car at the level of 95 g/km. It is a big challenge.The emission of harmful emissions is also a problem during the operation of vehicles. In real traffic conditions, a big challenge is the need to reduce average driving speeds due to emissions of harmful exhaust substances. With increasing driving speed, it increases. Therefore, the authors of the article decided to investigate the problem on the initial road and highway.In our research, mobile PEMS type testing equipment was used for tests of vehicles with emission standards: EURO 5 and EURO 6. The tests were carried out in real traffic conditions on a fast-moving and motorway road with speeds up to 110, 120, 140 and 160 km/h. The research was aimed at showing differences in the level of exhaust emissions of emitted vehicles resulting from the speed of travel. In the article, on the basis of the tests carried out, speed was determined and recommended, which from the point of view of emission will be optimal for efficient and ecological movement on this discussed type of roads.