Especially in terms of causing pass-ups, school rippers are extra trips put out before and after school when the number of passengers attending the school is so high that the students would overwhelm the regularly scheduled service in the absence of trippers. Tripper service can be required at any location where a very large number of passengers need to arrive or leave the location at the same time while mostly used with schools. Transit agencies must be sure that any school trippers they put out follow regularly scheduled routes and/or appear as regularly scheduled routes that the public can ride. SamTrans in San Mateo, CA and AC Transit in Oakland, CA are two transit agencies that have a large number of school service routes because of the school service rule. As little as twenty-minutes - they are very expensive to add, especially if the driver is working overtime, which is frequently the case, because trippers require the use of a driver and a separate vehicle for a very short period of time. In case there are not enough spares but adds additional cost in terms of prepping, servicing, and maintaining the vehicle, adding a peak bus not only can result in bus shortages.

When to use school trippers

We must employ strict passenger count requirements that regular service must meet in order to add one in case we want to avoid adding trippers. For example), we measure the maximum load of the regular trip, assuming the regular service schedule is optimized to meet the tripper trigger (the after school bell. A tripper will be required if the maximum load on the regular trip is greater than 125% of the seating capacity for a regular route that runs every thirty minutes or less. A tripper will be required if the maximum load on the regular trip is greater than 150% of the seating capacity, equivalent to a load of (38*1.5) = 57 on a regular bus for a regular route that runs more frequently than every thirty minutes. We require a greater load factor for a more frequent route because the consequences of being passed-up are not as great - it is not as big a deal to wait another 10 minutes for a bus as it would be to wait another 30 or 60 minutes. In case wheelchair user is passed-up at a bus stop federal ADA regulations generally require that the wheelchair be picked up within 30 minutes in addition to this. What this means is that on a route where the next bus will not arrive for at least thirty minutes, the transit agency must send a special vehicle to pick up the passenger. School trippers are generally not required on routes that run every eight minutes or more because the existing service is enough to absorb the demand within a reasonable time period. Sometimes the number of students will be so great that more than one tripper will be required. Repeat the steps in the above paragraph with following trips in case he students come out in waves to an extent that more than one regular trip could be expected to carry students.