Trave time included in Overtime pay

Is travel time included in the overtime pay? We are an open advertising company. We usually send our employees from one client to another. Like for instance they came from a client in La Union then went straight to another client in Batangas. They arrived in Batangas at 12 midnight. Although, formal work starts at 8am.

it should be included as that's still part of their job.. how can they get to point A to point B if you dont include the travel time?

Thank you for the reply.

I think meal allowance can be considered by the company if you are sending employee for business trip especially if he/she will be travelled not yet covering his/her regular wroking sched like what you had mentioned. - this is just my opinion.

Travel time is not considered work time unless the following conditions are met: Employees who drive vehicles which contain essential tools or equipment of the employer from their homes to work sites may be working while traveling; travel from home to a customer's site in response to an emergency call after the regular workday is work time; when an employee who normally works at one location is sent out of town on a single-day trip, time which is spent traveling is work time; an employee who travels away from home overnight is not working when they are a passenger on an airplane, train, boat, bus or automobile outside of the employee's regular work hours, however any time which the employee spends traveling as a passenger on a weekend will be counted as work time if the travel cuts across the hours which the employee would normally work during the week; and all travel which is compensable by contract, custom or practice must be counted as work time, regardless of the previous limitations on counting travel as work time.
On-call time is not considered work time if the employee can use the time spent on call primarily for his or her own benefit. If, however, an employee is required to wait at the employer's premises or at a particular location other than the employee's home, all of the waiting time must be counted as work time.

http://www.shrm.org/TemplatesTools/hrqa/Pages/Whatmustbeincludedashoursworkedwhencalculatingweeklyovertime.aspx