Drive on left or right
From r3366 there are some improvements to the support for driving on the left or right. Each tile has a flag to say if roads are drive on the left or right. It is known to make a difference with roundabouts and may be used in other ways.
You can also add detect which will use the country information to select
the correct side. The default is equivalent to
--drive-on=detect,right which means that if detection fails, it
will use drive on the right.
The old flags
--drive-on-right still work.
The detection uses the precompiled bounds (or country-abbr/country-name) to determine the country in which the roads are located, and the resource file LocatorConfig.xml contains a new attribute driveOnLeft="true" for all known drive-on-left countries
If a tile covers two countries where you drive on different sides of the road, then it cannot work for the whole tile and you get a warning. In the future we will be able to cut tiles on country boundaries so that the problem will then not arise.