FA-12213 / Navigation route constraints / Member archive
Lane guidance invents a connection to an exit lane · case 03
Lane guidance invents a connection to an exit lane in the controlled route-policy fixture.
Case contract
Return whether a directed lane transition exists; identity transitions are allowed only if explicitly present.
Why this case matters
Navigation policies depend on road context that a shortest-path cost alone does not encode.
One recorded failure
Sample boundary fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| wrong source lane | true | false | Failed |
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