This is the documentation of version 1.0.0-rc.4. Go to the latest version, 1.0.0-rc.5.

Function getInstructionLanes

getInstructionLanes(
route: Route,
instruction: Pick<Instruction, "pathPointIndex" | "maneuver">,
): LaneSectionProps | undefined
Finds the lanes section leading to an instruction's maneuver.
Parameters
- route: Route
  The route the instruction belongs to.
- instruction: Pick<Instruction, "pathPointIndex" | "maneuver">
  One of the route's guidance.instructions.
Returns LaneSectionProps | undefined
The lane section, or undefined when the route has none leading to the maneuver.
Remarks
calculateRoute returns lanes sections only with guidance, and not every maneuver has one.

A section leads to the last instruction inside it or, when it ends at a stop line short of the junction, to the next one after it. Where several lead to one instruction, the closest wins. Instructions sharing a point, such as a roundabout's entry and exit, leave the lanes to the first.
Example
```
const routes = await calculateRoute({ locations, guidance: { type: 'coded' } });
const route = routes.features[0];
for (const instruction of route.properties.guidance?.instructions ?? []) {
  const lanes = getInstructionLanes(route, instruction);
  // lanes?.lanes: each lane's directions, and the one to follow
}
```