There are a couple of proposed tagging schemas for intense mappers to map street areas and road markings to enable a much more detailed road rendering with accurate widths and lanes.

Proposed tagging schema for street areas

Mappers are already active in Poland using this proposal and also have a renderer in place to visualize this with pretty impressive results.

Road area tag rendering from OSM Poland

The next level is going to be having accurate lane marking within the surfaces, but it looks like till date there has been no successful attempt to render roads to such a level of detail. A few weeks ago, Rasagy from Mapbox wrote about styling individual lanes using the Studio tool. The approach uses individual lanes geometries and seem to give good results, but involves a lot of mapping effort.

An attempt to style individual lanes using Mapbox Studio

If anyone is interested to try their hand at styling roads to such level of details, there is a sample intersection that has been traced by Chetan_Gowda and Fa7C0N on the OSM sandbox in Manhattan. If you are using Mapbox Studio, you can directly start styling the data by adding this tileset to a new style. Alternatively, you can use a geojson of the data to use in any other styling tool or to just explore the tags used.

Looking forward to seeing any interesting experimental outputs :)