Ordinance 1925-93 - Laserfiche WebLink

YEAR SOV PERCENTAGE VMT/EMPLOYEE 1992 (base) 80% 8.5 1995 68% 7.2 1997 60% 6.4 1999 52% 5.5 Basic Methodology for Calculating SOV Trips The proportion of SOV trips and VMT per employee values for each affected employer will be determined using data from a survey of employees about their commute mode choice as shown in Exhibit 1. Calculation Assumptions The following assumptions will be used in counting commute vehicle trips: • Single-occupant vehicle trips count as one trip (includes one-person motorcycle and drive-on ferry trips). • Carpool trips count as the inverse of the number of occupants in the vehicle: 2-person carpool counts as 1/2 trip, 3-person carpool counts as 1/3 trip, 4-person carpool counts as 1/4 trip, 5-person carpool counts as 1/5 trip, 6-person carpool counts as 1/6 trip. • Vanpools of seven or more occupants and transit (bus and bike-on ferry or walk-on ferry) count as zero vehicle trips. • Telecommuting, alternative work schedules (excluding flex-time), bicycling, and walking count as zero vehicle trips plus a 20 percent credit--each commute trip eliminated or using non-motorized modes is counted as 1.2 trips eliminated. This assumption applies to both proportion of SOV trips and VMT per employee. For calculation purposes, VMT per employee is assumed to be the average trip length multiplied by the number of vehicle trips per employee (based on the above assumptions). As SOV trips are eliminated, fewer vehicle miles will be traveled. 9