Table 2 Inclusion/exclusion criteria

Inclusion

Papers that fulfill the search string

Academic journal, conference, workshop papers, and book chapters

Discipline: Transportation

Abstract and keywords are available

Exclusion criteria for titles and abstract

Study written in a language other than English

Study that is not identified as peer-reviewed

Exclusion criteria for full text

Publications without abstract

Study related to gamification topic but not to transportation

Study related to transportation but not to gamification concepts

Full text of the study is not available in the respected source