private IntersectionVertex v1, v2, v3, v4;
private StreetEdge e1, e1Reverse, e2, e3;
@Before
public void setUp() throws Exception {
_graph = new Graph();
// Graph for a fictional grid city with turn restrictions
v1 = vertex("maple_1st", 2.0, 2.0);
v2 = vertex("maple_2nd", 1.0, 2.0);
v3 = vertex("maple_3rd", 0.0, 2.0);