Limited previous research shows that travel by different modes evokes feelings. Also after-effects due to stress have been observed. Such travel-related feelings are important to consider in transport planning because of their possible consequences for travelers' emotional well-being. A theoretical framework is proposed that makes quantitative predictions of the impacts of transient feelings (emotional responses) on enduring feelings (current mood) with consequences during and after travel. Positive and negative emotional responses are posited to be evoked by transient critical incidents (e.g. disruptions) and non-transient factors (e.g. noise) during travel. Numerical experiments illustrate the quantitative predictions on current mood during and after travel for both types of evoking factors.