One of the most dangerous places on highways are crossings, adjunctions to them of other roads, congresses . danger of occurrence of incidents on them occurs because of the various reasons. Speeds of movement of the cars moving down from the basic road or driving on it, smaller in comparison with speed of cars, moving on the basic road. From adjoining roads on the basic a lot of dirt that increases skolzkost on an adjunction place is brought. Visibility of crossing from a place of the driver moving on the basic road, especially if crossing is located under the big corner to the basic road, is lowered. All it demands from drivers at an entrance to crossing of care and readiness for acceptance of safety measures.
When the driver, moving on the basic road, wishes to move down from it aside that it is safe to take place turn, it should lower speed. Therefore around crossing traffic conditions worsen, throughput decreases and there can be emergencies.
The Same picture is created at an entrance to bus stops, filling stations, points of maintenance service and other establishments located lengthways road.
For increase of safety, maintenance of convenience and throughput increase in such places arrange so-called transitive-speed strips. These strips are arranged in addition to the cores, on which practically cars dvizhutsja almost with identical and, as a rule, in the high speed.
Drivers who need to move down from a strip of the basic road and to slow down movement or at entrance from a back road to accelerate movement and to join the basic stream, on these strips carry out braking or dispersal. Therefore cars in the basic stream dvizhutsja, without changing speed, paternal traffic safety increases.
In cities and settlements transport moves on streets - as regards the territory located between built up or park sites (fig. 57). The tram way is the border designating edge proezzhej of a part, intended for movement of not rail vehicles in the given direction. Crossroads borders are defined by the imagined lines connecting external borders of sidewalks or roadsides .
a Fig. 57. Street elements:
1 - width of street, 2 - width proezzhej parts in the presence of an airfield for passengers of a tram, 3 - width of sidewalk, 4 - the cloth of tram ways located in the middle proezzhej of a part, 5 - the width of a carriageway on which tram ways are laid, but is not present an airfield, 6 - width proezzhej a part in the street without tram ways, 7 - width proezzhej a part from each party of parkway or a dividing strip, 8 - the cloth of tram ways displaced to one party proezzhej of a part, 9 - width proezzhej a part in the street where the cloth of tram ways is displaced, 10 - an axial line
In cities there are big sites, free from building which from the various parties streets adjoin. Such sites name the areas. They differ from crossroads only in the big sizes of territory.
<= the previous page