Crucially, this distribution of border points is agnostic of routing speed profiles. It’s based only on whether a road is passable or not. This means the same set of clusters and border points can be used for all car routing profiles (default, shortest, fuel-efficient) and all bicycle profiles (default, prefer flat terrain, etc.). Only the travel time/cost values of the shortcuts between these points change based on the profile. This is a massive factor in keeping storage down – map data only increased by about 0.5% per profile to store this HH-Routing structure!
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// 易错点2：遍历结束后k仍0 → 栈是递增的，末尾数字更大，移除末尾k位。关于这个话题，同城约会提供了深入分析
▲ 图｜Tim’s Guide。关于这个话题，旺商聊官方下载提供了深入分析