Tillståndsuppföljning av observationssträckor: lägesrapport för LTPP-projektet till och med 2012-–12

Download

The objective of this project is to collect and deliver high quality road data primarily for the development of performance prediction models. The monitoring of the LTPP sections started in 1984 on commission of the Swedish Road Administration. The aim is primarily to focus on road deterioration caused by heavy traffic. In 2012 there were still 304 active LTPP sections distributed over 33 sites. The monitoring programme includes the following activities: • Distress surveys. Annual surveys are carried out by walking over the sections. During the survey all distresses and surface defects are recorded. The grading of the distresses and defects is based on a national distress manual. • Road surface monitoring. The monitoring is carried out every second year using a vehicle developed by VTI. The ‘Laser Road Surface Tester’ can be equipped with up to 19 laser gauges. • Measurement of the bearing capacity. The capacity is calculated with a Falling Weight Deflectometer and normally carried out one year after maintenance measures. The normal strategy is to measure all new sections and after maintenance. • Collection of climate data from automatic weather observation stations close to the sections. • Collection of traffic data normally every fourth year. • Quality control check of all collected data. • Calculation of an annual crack index. The index is calculated from the type of crack, crack distress grade and crack propagation.

MEET US


25-27
Aug

ICTTP 2020

ICTTP, International Conference on Traffic and Transport Psychology, is held in Gothenburg, Sweden.

LATEST NEWS


2018-11-19

Report regarding government commission on the costs of traffic to society has been submitted

Since 2013, the Swedish National Road and Transport Research Institute (VTI) has had several government commissions to produce documentation on the costs to society caused by traffic. On 1 November 2018, the agency reported its latest commission, Samkost 3....


2018-10-29

International standardisation efforts have many advantages

VTI participates in several international standardisation committees. The work is important because it helps to ensure that standards can be adapted to Swedish conditions and it also provides access to valuable contacts and networks.


2018-10-24

China wants to work with the best

Through the CTS cooperation, VTI is gaining valuable research contacts with China. The country is facing major challenges in the field of road safety but also has enormous potential.


2018-10-23

VTI participated in conference on electric roads

Systems with electrified roads are a relatively new concept and many projects have been launched in recent years. To stimulate the transfer of knowledge and collaboration, the Research and Innovation Platform for Electric Roads arranged its second...


2018-10-18

ADAS&ME is tackling the interaction between people and technology

ADAS&ME is a major EU project focused on automation, the human condition and the human environment. The budget is EUR 9.6 million and VTI is the coordinator.


2018-10-05

Users contribute to the development of train simulators

Apart from advanced driving simulators, VTI has developed several variations of train simulators which are used for training, education and research. In recent years, interest has increased drastically among major actors in the railway sector, and VTI has...