What does a two-way two-lane road mean?

[SanJudah]

A two-way two-lane road features a yellow dashed centerline on the pavement to separate opposing traffic flows. This line is typically marked along the center of the roadway but is not strictly limited to the geometric center, allowing vehicles to cross or make left turns when safe. Below are relevant details: 1. Two-way traffic explanation: On roads wide enough for two motor vehicle lanes in each direction, a yellow center dashed line should be marked. It guides drivers to stay on the right side, maintain their lanes, and follow directional traffic flow. 2. Distance specifications: Each lane on a two-way two-lane highway is 3 meters wide. The central median has no uniform standard and is adapted to local conditions. A simple concrete median is typically 1 meter wide, while a landscaped median can vary significantly, sometimes spanning dozens of meters in width. Intercity highways generally lack sidewalks, whereas urban arterial roads must include them. Sidewalk width on urban arterials is determined by pedestrian volume, with a minimum of 3 meters and potential widths of 15-20 meters.