APPARATUS AND METHOD FOR FORMING AND ANALYZING CONNECTED ROADS

Aspects of the disclosure provide an apparatus and a method for forming and analyzing connected roads. The apparatus can include processing circuitry. The processing circuitry determines, based on a first map of a region having road segments, a second map having connected roads. One of the connected roads is formed by combining a plurality of the road segments and is longer than a threshold. The processing circuitry determines road complexity of one of the connected roads in the second map for route planning and/or testing.