The number of crashes caused by driver sleepiness or driver distraction is high. Rumble strips (milled) could be an alternative countermeasure on narrow roads where fences are not possible to be used. The Swedish Road Administration has initiated an evaluation of the effects of the use of milled rumble strips in the road centre on narrow roads. The evaluation includes crash studies, measurements of speed and lateral position in traffic flow and the drivers' opinions about the measure. This study focuses on the drivers' opinions. Discussions within focus groups with motorcyclist and commuters have been performed, but also road side interviews with 360 drivers at spots along roads where rumble strips are used. The results from the discussions within focus groups indicate that rumble strips are not a problem for either the motorcyclists or the commuters, taking into account both traffic safety aspects and accessibility. The motorcyclists do not seem to be influenced at all, in opposite to commuters who discussed the influence on speed and lateral position. The results from the road side interviews show that the majority (85%) do not think they reduce speed because of rumble strips. The majority of the drivers (58%) said that they do not change the distance to the centre of the road because of the rumble strips. In conclusion 90% of the drivers reported that they thought that the rumble strips will contribute to increased traffic safety. From the drivers' point of view we recommend further use of rumble strips in the centre of the road on roads with a lane width of around 9 meters.