Slow lane
As a slow lane or in Switzerland as a slow lane , an additional lane (is additional lanes ) referred to long and steep road sections, which for slow-moving vehicles (usually heavy traffic ) is intended. With its help, the obstruction of the flow of traffic (congestion) by slowly moving vehicles can be avoided. It also contributes to increasing road safety, as the number of overtaking maneuvers is significantly reduced. In order to keep the construction costs and the interventions in the landscape low, slow traffic lanes are only built on incline sections that are of a certain length and are noticeable due to the increased proportion of heavy traffic.
The additional lane is announced at the beginning by corresponding signs and marked with a longitudinal marking. At the end of the slow lane there is a narrowing of the lane, also announced by signs.
Situation in different countries
In most countries of Europe to set up a slow lane is contemplated by the roadside pitch of about 3%, in some strong alpine countries dominated by a higher limit is partially discussed: This means that only when a stronger pitch to begin the construction of slow lanes should.
In Germany, the prevailing opinion is that due to known problems with the construction and operation of motorways in southwest Germany (especially in the Swabian Alb ), motorways with a gradient of more than 3% should only be built with slow traffic lanes.
In Italy, people today allegedly regret that the route Bologna - Florence of the A1 does not have slow lanes in the area of the Apennine crossing . In the case of motorways built later, the limit was usually set at gradients over 3%, e.g. B. on the Milan - Genoa route ( A7 ).
In Austria , the Brenner Autobahn was built with slow lanes on all gradients of over 3%.
In Switzerland , on the other hand, comparable routes were only given a creep track later. The definition of Art. 34, Paragraph 7 of the Signaling Ordinance 1963 read: "The signal 'crawl lane' (317) indicates that the outermost lane on the right is intended for slow vehicles." , since then the signal “2.31 minimum speed” has been attached to “4.77.1 Display of lanes with restrictions”. For reasons of traffic safety, the left-hand lane is removed today on inclines at the apex of an incline and the actual crawl lane becomes a standard lane.
Web links
Individual evidence
- ^ Günter Wolf: Street planning . Werner Verlag, Munich 2005, ISBN 3-8041-5003-9 , pp. 49 .
- ↑ Road safety on inclines - Criteria for additional lanes (BASt report V 87) ( Memento of the original from May 18, 2015 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
- ↑ a b c interpellation of November 4, 1963 - crawl at the Gotthard tunnel
