Appendix 2 AVERAGE VEHICLE RIDERSHIP (AVR) CALCULATION METHODOLOGY
Average Vehicle Ridership Methodology (AVR) Survey Week. The averaging period used for the survey week cannot contain a holiday and shall represent a normal work week situation so that a representative projection of the AVR is obtained. For vehicle use during the survey week, bicycle, transit vehicles, buses serving several work sites, and cars stopping en route to other work sites shall be excluded from the vehicles counted, as shall low emission vehicles as approved by the MBUAPCD.
The AVR for a work site shall be calculated by dividing the total “employee-days” for the survey week by the total “vehicle trip-days” for the survey week.
Employee-Days. “Employee-days” are the total number of employees reporting or assigned to a work site during the peak period each work day of the survey week. The following procedures are used in totaling employee-days:
1. Employees who telecommute or are off due to a compressed work week schedule are counted as reporting to the work site in calculating the total employee-days.
2. The following employees are not included in the employee-days total:
a. Employees not working because of vacation, sickness or other time off;
b. Employees who report to a different work site or an off-site work-related activity;
c. Disabled employees.
Vehicle Trip-Days. The total number of vehicles used by employees in reporting to the work site each work day of the survey week. A vehicle trip-day is based on the means of transportation used for the greatest distance of an employee’s home to work commute trip. The following numerical values are used in calculating vehicle trip-days:
1. Single-occupant vehicle (drive alone) equals one;
2. Employee dropped off via vehicle by nonworking person equals one;
3. Carpool equals one divided by the number of employees in the carpool, regardless of whether or not the other employee(s) in the carpool work for the employer or at the work site;
4. Vanpool equals one divided by the number of employees in the vanpool, regardless of whether or not the other employee(s) in the carpool work for the employer or at the work site;
5. Motorcycle, moped, scooter or motor bike equals one;
6. The following all equal zero vehicle trip-days:
a. Public transit,
b. Private buspool,
c. Bicycle,
d. Walking and other nonmotorized transportation modes,
e. Employees who telecommute (only on the days those employees work at home for the entire day), f. Employees who work a compressed work week schedule (only on their compressed day(s) off),
g. Disabled employee vehicles at all times.
Sample Calculation. What is the AVR for an employer with one hundred employees all commuting to and from work, on weekdays between six a.m. and ten a.m. and between three p.m. and six p.m.?
Employees reporting to work during the survey week:
|
Monday |
100 |
|
Tuesday |
100 |
|
Wednesday |
100 |
|
Thursday |
100 |
|
Friday |
100 |
|
Total: |
500 |
Number of vehicles driven to the work site by these employees:
|
Monday |
77 |
|
Tuesday |
79 |
|
Wednesday |
72 |
|
Thursday |
68 |
|
Friday |
74 |
|
Total: |
370 |
AVR is derived from dividing the number of employees reporting to work during the hours of six a.m. to ten a.m. during the week (e.g., 500) by the number of vehicles driven to the work site between the same hours (e.g., 370):
|
500 Employees |
= |
1.35 Average Vehicle Ridership (AVR) |
|
370 Vehicles |