A personal auto policy may have coverage for ________________ which the insured may incur after a loss, up to $20 a day or $600 maximum.

The correct answer is transportation expenses. In a personal auto policy, transportation expenses refer to the costs incurred by the insured for transportation after an auto loss. This coverage assists with expenses such as bus fares or rental vehicle charges while the insured's car is being repaired. The policy typically allows for reimbursement up to $20 per day, with a total maximum limit of $600. This provision is included to ensure that the insured is not left without a means of transportation following an accident or loss, addressing practical needs during the repair period.

Other options like emergency repairs, rental cars, and towing services are valuable coverages but are not categorized under transportation expenses within a personal auto policy. Emergency repairs are generally covered up to a certain limit for immediate fixes after an accident, while towing services cover the cost of having the vehicle towed. Rental cars may be covered by separate provisions or endorsements but do not fall under the basic transportation expenses coverage of the personal auto policy.