Customizable Contraction Hierarchies -- A Survey

TL;DR

This survey comprehensively reviews and advances Customizable Contraction Hierarchies (CCH), demonstrating its competitive performance and flexibility compared to other route planning methods through detailed evaluation and proposed refinements.

Contribution

It provides a detailed overview of CCH, reviews recent developments, and introduces refinements that enhance its performance and feature support.

Findings

CCH is competitive with CH and CRP in performance.

The survey consolidates state-of-the-art CCH techniques.

Refinements improve CCH's efficiency and feature support.

Abstract

This work establishes the technical fundamentals of a well-tuned Customizable Contraction Hierarchies (CCH) implementation that is simple and elegant. We give a detailed overview of the state of the art of CCH, review recent advances on CCH and show how to combine them. Additionally, we propose further refinements that improve the performance of CCH. An extensive evaluation confirms that a CCH framework is not only comprehensive in supported features but also competitive in performance to both Contraction Hierarchies (CH) and Customizable Route Planning (CRP).