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Public-images-osm logo.svg side_road
tag for marking side carriageways of roads. Edit or translate this description.
Group: Highways
Used on these elements
should not be used on nodesmay be used on waysshould not be used on areasshould not be used on relations
Useful combination
Status: unspecified

Key side_road (Russian: боковой проезд) is used for marking side carriageways of roads. These are not the same as Frontage roads. Please remember that these do not exist in every city or in every country!


In this description, "side road" (Russian: боковой проезд) is a separate carriageway of road which usually, but not necessarily, is located next to the main carriageway and begins after one crossing and ends before the next crossing. Principal difference from trafficway, which goes across adjoined territory (Russian: прилегающая территория) is acceptance of transit movement[1]. Side road can has both oneway and two-way direction. It can have traffic signs, restricted maximal speed, pedestrian crossing (Russian: пешеходный переход) and traffic lights. On the one hand, transit movement across side road is not restricted - so routing across side road by navigators is not contradicted with traffic rules[1]. On the other hand, for entering to side road driver, perhaps, it is necessary to do realignment, decreasing of speed, for returning to main carriageway - give a way to cars, going across main carriageway. So it recommended to avoid movement across side roads, if it is possible. Necessarity to distinguish side roads from main carriageways can happens, for example, when doing binding tracks to roads. To mark, that carriageway is such side road - pocket (Russian: боковой проезд - карман) add side_road=yes (if there are trafficways, connecting side_road with main carriageway), side_road=double (if side road is a full-fledged double for main carriageway) or side_road=rotary (if side road is used for turning to intersectable or adjoining road because turning from main carriageway is physically impossible or prohibited) additionally to tag highway=residential (for side roads, going near appartments) or highway=unclassified (for side roads, going near factories). Sometimes, we can't avoid using of side roads, because some of them are used for maneuvers, which are restricted at main carriageway. Roads, which joined only to side road, but no to main carriageway, can exist. In such cases status of side road can be any. (highway=tertiary, highway=secondary etc.). There different opinions about using tag name=* at side roads: some people think, that we can do it, some - that we can't do it.


There are some another words, that can be used for such trafficways: "pocket" (Russian: карман), branch (Russian: рукав), "small side way" (Russian: боковая дорожка). It is necessary to distinguish side roads, about which we are talking in this page, (Russian: карман) from side roads, which we can see in traffic rules (Russian: карман)[1] - widening of carriageway, which are used for stops or parking.

In the United States, these roadways are called "frontage lanes" or "frontage roads". However, not all frontage roads can be tagged side_road=yes. For example, in Texas, many urban freeways feature substantial frontage roads that are distinct from the ones described on this page.


It is useful to add additionally to side_road=yes, side_road=double or side_road=rotary some tags, describing the trafficway: width=*, lanes=*, surface=*, smoothness=*, surface:grade=*, maxspeed=*, maxspeed:practical=* at side roads, tags highway=give_way or highway=stop at points of joining to main carriageway, tag traffic_calming=* at nodes of location artificial unevennesses, tag highway=crossing - at nodes of pedestrian crossings (Russian: пешеходный переход), marked with traffic signs at side roads, tag highway=traffic_signals at nodes of location of traffic lights. Tag side_road doesn't establish automatically restrictions, it is used for marking carriageways, which are not central (onsetter): lateral ways (Russian: боковые проезды), side roads (Russian: карманы) and ways, which connect central carriageways with lateral carriageways.


External links