Zh-hans:Tag:highway=tertiary

三级道路（highway=tertiary）用于绘制连接小城镇和小城镇、或小城镇和城市的三级公路。交通网络中常用三级公路来连接小型公路与主要公路。

在台湾，三级道路用于地方政府编制的乡道、聚落联络道路、市区干道等。

在中国大陆，三级道路用于乡道，或者城市支路。

使用方式

在城市地区之外，三级道路是连接小型聚落（例如村庄（village）或自然村（hamlets））间的中低流量道路。关于流量较低的联络道路，请考虑使用highway=unclassified替代；流量较高的连接路线，请使用highway=secondary或更高级的道路替代，但请注意在发达的区域之外，可能没有比其流量更大的道路。

在大型都市聚落（例如大型城镇或城市），三级道路连接区域活动的中心，例如零售区、文教区、郊区等，只用于中低流量的交通。针对更低流量的联络道路，非住宅区道路考虑使用highway=unclassified替代；更高流量的路线与主要道路使用highway=secondary或更高级的道路。

三级道路也用于连接低流量、狭窄的街道（常以highway=residential、highway=unclassified呈现）至高流量、宽广的主干道（highway=secondary或更高级别的道路）之间。

在道路规划的层级中，三级道路可能被视为「collector 或distributor roads」。然而，无论是经规划或发展中的路网，此标签常用作标记任何路网。使用此标签标记中等服务级别的道路，或只是比其他次级街道更发达或更常被使用的联络道路（如果在您绘制的区域，当地没有充分的道路规划或道路种类）。

如何绘制

如同其它的highway=*一样的方法绘制三级道路：若使用卫星图像，需要沿道路中线绘制一条线，使用highway=tertiary进行标记，并为道路加入更多标签以补充说明道路状况。

如需为道路加入更多信息，请进一步添加下列标签：

• name=名称 - 道路名称。例如：“五一路”；
• maxspeed=数字 - 道路法定最高限速（公里每小时），例如：“40”；
• minspeed=数字 - 表示行驶道路必须达到的最低限速；
• ref=编制名称 - 道路的编制号码，请参见该地区道路的编号系统，例如“Y001”；
• loc_name=名称 - 非官方或道路俗称；
• maxweight=数字 - 最大载重限制（吨），例如“5.5”
• surface=* - 道路路面材质说明。例如“unpaved”（未铺装）；
• width=数字 或 est_width=数字 - 道路宽度（米），例如“4.5”；
• lanes=数字 - 道路可用车道数，通常为“1”或“2”；若对向车辆通过不需减速，即使无中央分隔线，仍为「2」。

特殊情况

下列是一些特殊的三级道路：

• highway=tertiary_link - 通往或离开道路的连接路。
• bridge=yes + layer=1 - 如果道路上跨街道或水路。
• tunnel=yes + layer=-1 - 如果道路下穿街道或水路。

各地案例

下列为各个国家和地区如何使用标签的比较表，用户应该查阅特定国家的指南以了解更多详细讯息及其他标签。

关于不同地区的特别规定与如何标记各国特定标签的列表，请参见Category:Projects。

国家和地区	使用说明	更多详情
澳大利亚	Other roads linking towns, villages and Points of Interest to each other and the secondary network. In South Australia, roads that are classified as a 'D' route under the Alphanumeric system use this classification.	Australian Roads Tagging
中国大陆	乡道或城市支路。
希腊	Unclassified roads that connect towns, villages and points of interest to each other and classified roads.	WikiProject Greece § Road Network
萨尔瓦多	Roads whose traffic intensity is between one hundred and five hundred average vehicles per day, have six-meter platforms and are coated with selected local materials and a minimum span of six meters, fifty centimetres on bridges.
葡萄牙	Attributed to Municipal Ways (with official ref=CM *) Maybe also used on roads without official reference, but which have lanes separated by a central line.	Portugal's highways standardization
英国	There is a corresponding official alphabetic classification matching OSM's "tertiary" tag fairly well: 'C' roads. Note that this official designation is rarely seen on signs. For the purposes of mapping, it's normally best to tag distributor roads according to their relative importance in the road hierarchy, as described above. One rule of thumb for UK roads is that highway=tertiary works well for roads wider than 4 metres (13') in width, and for faster or wider minor roads that aren't 'A' or 'B' roads. In the UK, they tend to have dashed lines down the middle, whereas unclassified roads don't. Always consider the road in its context too. Where it makes sense to do so, favour keeping the classification continuous on the map over strict adherence to physical criteria.	Roads in the United Kingdom
美国	Since most towns and villages are connected primarily by state roads and US roads, tertiary roads usually refer to the less busy county roads, and main connector roads through neighborhoods. It also can refer to roads without a ref=* that connect towns, ind addition to the criteria listed above.
委内瑞拉	Main roads in a city or rural area, driving traffic from an area onto a higher priority highway. Used when a main road cannot be solved well with a simple highway=residential (in urban areas) or highway=unclassified (in rural areas). In densely populated cities, tertiary streets should be able to lead you through a large area or big neighborhood, directly and without interruptions, towards a higher priority road. It is a main roads network inferior to highway=secondary.

参见

拓展阅读

• Approved features/highway=tertiary