Should I purchase other optional insurances when renting a car for business travel?

University travel policy requires that any rental car used for university business have Liability Insurance, as well as Damage Waiver or Collision Damage Waiver or Loss Damage Waiver (DW/CDW/LDW). When utilizing OSU’s contract through Enterprise, National or Hertz, these insurances are automatically included in the contract rate. Additional supplemental insurances, such as Personal Liability Insurance (PAI), or Personal Effects Protection (PEP) are not required by the university, nor eligible for reimbursement.