bylane or by-lane : CORRECT

bye-lane : NO LONGER USED

by-lane: a side lane⁽¹⁾

by-lane: A private lane, or one opening out of the usual road⁽²⁾

bylane: a side lane or alley off a road⁽³⁾

bylane: a secondary road or lane⁽⁴⁾

bye-lane: Obsolete form of bylane^{(5) (6)}

Bibliography:

1. Definition of BY-LANE [Internet]. [cited 2022 Apr 20]. Available from: https://www.merriam-webster.com/dictionary/by-lane

2. By-lane [Internet]. TheFreeDictionary.com. [cited 2022 Apr 20]. Available from: https://www.thefreedictionary.com/By-lane

3. Bylane definition and meaning | Collins English Dictionary [Internet]. [cited 2022 Apr 20]. Available from: https://www.collinsdictionary.com/dictionary/english/bylane

4. Definition of bylane | Dictionary.com [Internet]. www.dictionary.com. [cited 2022 Apr 20]. Available from: https://www.dictionary.com/browse/bylane

5. bye-lane. In: Wiktionary [Internet]. 2020 [cited 2022 Apr 20]. Available from: https://en.wiktionary.org/w/index.php?title=bye-lane&oldid=60314614

6. bye-lane - WordSense Dictionary [Internet]. [cited 2022 Apr 20]. Available from: https://www.wordsense.eu/bye-lane/