Adding travel time is great but it doesnt show in the calendar. So our reception - if they don't know the location of the job - makes the appointment and then books it in; it should visually show that it is travel time [especially if it is 1-2hr travel time]. Even a greyed out/or checked colour of the actual colour.
Example:1x tech is green. He has an appointment that goes for an hour. The appointment block is green. but the travel time is an hour there and an hour back. The travel time could come up as a slightly see-through or checked green. So that it shows the time is technically booked/but shows that it is travel rather than job-time.