Trafiksimulering av E20 Ribbingsberg–Vara: En simuleringsstudie av framkomlighet för en mötesfri utformning av E20


The part of road E20 between Ribbingsberg and Vara in Sweden will be converted from a two-lane rural road with speed limit 80 kilometers per hour into an oncoming separated highway with speed limit 100 kilometer per hour. The suggested design of the oncoming separated highway includes sections of 1+1 and 2+2 lanes with varying lengths between 1.6 and 3.2 kilometers. Due to the current high level of traffic demand in combination with high levels of trucks, the traffic performance at the suggested design could be questioned. In order to evaluate traffic performance, a traffic simulation study has been performed for the peak hour during a typical weekday. The study includes three different scenarios of traffic demand, representing levels of year 2015, 2025 and 2045. Simulations are performed using the microscopic simulation model RuTSim (Rural road Traffic Simulator), developed by VTI and customized for rural traffic. The model is calibrated using measurements from the actual road stretch in combination with data from the adjacent oncoming separated highway with speed limit 100 kilometers per hour between Vara and Skara. Simulation of year 2045 generates average speed for cars of 94 kilometers per hour. Sensitivity analysis of limited overtaking willingness results in average speed as minimum 92 kilometers per hour.

This means that the traffic performance fulfills the condition according to Trafikverkets former requirement that the average speed for cars should not be less than 10 kilometers per hour below the speed limit (100 kilometer per hour). The share of constrained vehicles also supports the conclusion of a design with satisfying traffic performance. It should though be mentioned that the lengths of the twolane segments within the suggested design exceeds the recommendations according to Trafikverket



International Conference on Electric Road Systems starts today

Electric Road Systems (ERS) is a relatively new concept with many initiatives on the way. To learn from each other and stimulate new collaborations the Swedish Research and Innovation Platform for Electric Roads arranged the first international conference...


Same survey of road users’ attitudes in 50 countries

At the Road Safety on Five Continents Conference, RS5C, one entire session presented a large survey of road users' attitudes in 38 countries. Results show large differences between countries in many areas, both regarding behavior and attitudes. A new survey...


Good results with alcohol interlock program according to Swedish study

An alcohol interlock program makes it possible for drink driving offenders to continue their everyday lives. In a Swedish study most of the participants were satisfied with the program and experienced improved health. They also reported drinking alcohol more...


Traffic safety in the spotlight

Today the Conference Road Safety on Five Continents (RS5C) opened in Jeju Island, South Korea. More than 220 participators have come from all over the world to present findings and learn about traffic safety. Dr. Young Tae Kim, Secretary-General of the...


VTI will develop simulators for ambulance staff

VTI has initiated a pilot study for paramedics with the Centre for Teaching & Research in Disaster Medicine and Traumatology and Linköping University. The aim is to give ambulance staff the opportunity to practice critical medical tasks in a moving vehicle in...


Unique electrified road opens in Sweden

The world’s first electrified road recharging the batteries of cars and trucks while driving opened in Sweden. The Swedish Minister for Infrastructure, Tomas Eneroth, was at the formal inauguration of the electrified road on April 11, 2018. VTI is one of 22...