A vehicle comprising: an internal cabin; and a sanitizing system comprising: a plurality of ultraviolet lamps mounted at various locations within the internal cabin of the vehicle, wherein the UV lamps are configured to receive electrical power from a power source onboard the vehicle and to emit UV light into the internal cabin during a trip of the vehicle; and a control unit including one or more processors and operatively connected to the UV lamps, the control unit configured to modify the electrical power supplied to one or more of the UV lamps located in a common area of the internal cabin based on occupancy of the common area; wherein responsive to detecting that an occupant of the common area has exited the common area, the control unit is configured to operate the one or more UV lamps located in the common area at a high power level for a designated time period to provide rapid sanitization of the common area; and wherein the control unit is configured to operate the one or more UV lamps at a lower power level while an occupant is within the common area, unless the occupant enters the common area within the designated time period after a previous occupant exited the common area. an internal cabin; and a sanitizing system comprising: a plurality of ultraviolet lamps mounted at various locations within the internal cabin of the vehicle, wherein the UV lamps are configured to receive electrical power from a power source onboard the vehicle and to emit UV light into the internal cabin during a trip of the vehicle; and a control unit including one or more processors and operatively connected to the UV lamps, the control unit configured to modify the electrical power supplied to one or more of the UV lamps located in a common area of the internal cabin based on occupancy of the common area; wherein responsive to detecting that an occupant of the common area has exited the common area, the control unit is configured to operate the one or more UV lamps located in the common area at a high power level for a designated time period to provide rapid sanitization of the common area; and wherein the control unit is configured to operate the one or more UV lamps at a lower power level while an occupant is within the common area, unless the occupant enters the common area within the designated time period after a previous occupant exited the common area. a plurality of ultraviolet lamps mounted at various locations within the internal cabin of the vehicle, wherein the UV lamps are configured to receive electrical power from a power source onboard the vehicle and to emit UV light into the internal cabin during a trip of the vehicle; and a control unit including one or more processors and operatively connected to the UV lamps, the control unit configured to modify the electrical power supplied to one or more of the UV lamps located in a common area of the internal cabin based on occupancy of the common area; wherein responsive to detecting that an occupant of the common area has exited the common area, the control unit is configured to operate the one or more UV lamps located in the common area at a high power level for a designated time period to provide rapid sanitization of the common area; and wherein the control unit is configured to operate the one or more UV lamps at a lower power level while an occupant is within the common area, unless the occupant enters the common area within the designated time period after a previous occupant exited the common area.