This is your opportunity to show the interviewer that you are wise and do not allow these unplanned situations to get the best of you. Start off by telling the interviewer that you would assess how much time you have until your shift starts. Taking into account this amount of time, you would call/text a couple of friends or family members to see if they could get you to work on time. If they are unavailable, you would call for a cab, take city transportation, or walk depending on how far away you are. Finally, be sure to mention that you would call the restaurant to let them know what happened if you will be arriving a few minutes late due to the setback.