ATT 1 - Fall 2022 NBS Monitoring Report — Mountain View City Council, May 9, 2023

60 S. Market Street | Suite 700 | San José, CA 95113 | (408) 278-1700 | Fax (408) 278-1717 www.fehrandpeers.com
Memorandum
Date: March 1, 2023
To: Ben Pacho, City of Mountain View
From: Elynor Zhou, Daniel Rubins, and Julie Morgan, Fehr & Peers Subject: Fall 2022 North Bayshore District Transportation Monitoring Summary SJ22-2186
This memorandum reports the results of the Fall 2022 North Bayshore (NBS) District Transportation Monitoring. Since February of 2014, the City of Mountain View has collected data on vehicle and person trips entering the North Bayshore District to evaluate gateway volume performance and mode share. Most employers in the district adopted hybrid work schedule after Santa Clara County Public Health Department lifted the shelter-in-place order to slow the spread of COVID-19.

Key Findings
Below is a summary of the key findings of this monitoring. • Observations During Continued Pandemic Disruption: The Fall 2022 observations do not represent typical conditions because many employees are working remotely and only some essential employees have returned to North Bayshore. During this transitionary period the observed travel behavior includes a high portion of employees not coming to the workplace regularly, a higher-than-typical drive-alone percentage for those employees who are coming to the workplace, and the return of peak hour vehicle congestion. These observations can be quite useful for return-to-work planning and long- term policy development.
• Gateway Trip Cap Monitoring (2021 Circulation Study Directional Trip Target): Each of the three gateways are below their peak period vehicle trip cap during both the morning and evening periods. Shoreline Boulevard and Rengstorff Avenue gateways combined have remaining capacity of 39% during morning peak period and 68% during evening peak period (i.e., in compliance with the gateway trip cap policy).

Attachment 1
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• Morning Peak Period and Peak Hour: The morning vehicle 3-hour peak period is from 8:15 to 11:15 AM, with the peak hour occurring from 9:15 to 10:15 AM. • Evening Peak Period and Peak Hour: The evening vehicle 3-hour peak period is from 4:00 to 7:00 PM, with the peak hour occurring from 5:00 to 6:00 PM. • Morning Combined Gateway Mode Share: In the morning peak hour, people enter North Bayshore using the following modes: 69% in single-occupant vehicles (SOVs), 10% in shared-ride vehicles, 17% on transit, 3% biking, and 1% walking. The morning inbound peak hour SOV mode share has varied since monitoring began, from as low as 49% in the Fall of 2017 to as high as 70% in Fall of 2021.
• Evening Combined Gateway Mode Share: In the evening peak hour, people exit North Bayshore using the following modes: 63% in single-occupant vehicles, 16% in shared-ride vehicles, 18% on transit, 2% biking, and 1% walking.
• Shoreline Boulevard Peak Vehicle Volume: The Shoreline Boulevard gateway experiences the highest volume of the three gateways and the volume peaks between 8:45 and 9:45 AM.
• Most Used Gateways in the Morning: Rengstorff Avenue and Shoreline Boulevard are the most heavily used gateways into the North Bayshore District; between them, they accommodate over 85% of the vehicles that enter the district in the morning. • Least Used Gateway in the Morning: The San Antonio Road Gateway is the most lightly used in the morning.
• Most Used Gateway in the Evening: Rengstorff Avenue and Shoreline Boulevard carry the most traffic during the evening peak hour and 3-hour peak period; many commuters use Shoreline Boulevard to exit the North Bayshore area in the afternoon. • Most Used Gateways by Transit Vehicles: During both morning and evening peak periods, the Rengstorff Avenue and San Antonio Road Gateways serve over 80% of all transit riders.

Definition of Gateway Vehicle Capacity
The physical vehicle capacity of the three main gateways (San Antonio Road, Rengstorff Avenue, and Shoreline Boulevard) represents the number of vehicles that can be served during the peak morning and evening periods while maintaining reasonable freedom of vehicular movement (i.e., avoiding gridlock conditions). To establish the 2014 NBPP vehicle trip targets, a traffic operations analysis was conducted (North Bayshore Precise Plan EIR – Establishing Vehicle Gateway Capacity and Sensitivity Tests on Accommodating New Growth, Fehr & Peers, July 2014), which assumed the completion of the land uses envisioned in the 2014 NBPP. Because the 2017 NBPP envisioned a different set of land uses, with the inclusion of nearly 10,000 residential dwelling units, an updated Ben Pacho
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gateway capacity analysis was conducted (North Bayshore Precise Plan EIR – Vehicle Gateway Capacity with Residential, Fehr & Peers, December 2016).

The North Bayshore Circulation Study (approved by the City Council in December 2021) has developed modifications to the North Bayshore District Trip Cap Policy, which is similar but slightly greater than the gateway capacity of the North Bayshore Gateways. The counts are compared with the adopted vehicle trip target in the Circulation Study for peak period peak direction volumes at Rengstorff Avenue and Shoreline Boulevard. 2021 Circulation Study Gateway Trip Target
Per the recommendations of the Circulation Study, City staff is working to amend the North Bayshore Precise Plan to modify the trip targets as gateway transportation improvements are constructed. Specifically, the 2021 North Bayshore Circulation Feasibility Study (2021 Circulation Study) changed the vehicle trip targets to a directional inbound morning 3-hour peak period and outbound evening 3-hour peak period for Shoreline Boulevard and Rengstorff Avenue combined.

These targets reflect the existing transportation network. The calculated numeric policy targets recommended in the North Bayshore Circulation Feasibility Study are presented in Table 1 and account for the existing transportation network.

Table 1: Recommended North Bayshore District Trip Cap Policy Targets Gateway Inbound Morning
Peak Period
Outbound Evening
Peak Period
Shoreline Boulevard & Rengstorff Avenue 16,350 15,330
Note: Vehicle volumes rounded to nearest 10.

Source: City of Mountain View, North Bayshore Circulation Study staff report, December 2021.

Gateway Trip Targets
The NBPP Trip Cap Policy is expressed as an absolute number of vehicles and is similar but slightly greater than the gateway capacity of the North Bayshore gateways. The NBS vehicle trip targets (also sometimes referred to as trip caps) have been set based on three key factors: time period, direction, and location.
• Time period: The most common time periods for traffic analysis are a single peak hour or a three-hour peak period. In general, a trip target set for a single peak hour will be more restrictive than one set for a peak period. In the North Bayshore area, congested conditions typically last for multiple hours in both the morning and the evening. In North Bayshore either a peak hour or a peak period trip target will be similar because of the duration of congestion at the gateways.

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• Direction: Targets can be set for a single direction of travel, or for both directions combined. A peak direction (e.g., inbound in the morning) vehicle trip target is simple to understand; however, that trip target would need periodic adjustment as different types of land uses (namely, residential) are added to NBS, because the physical capacity of one direction of travel will change depending on how much travel occurs in the other direction. A trip target set for both directions combined is a more complete indicator of gateway capacity and no adjustment would be needed as different land use types are added to NBS.
• Location: Trip targets can be set for each gateway individually, or for combinations of two or three gateways. A target set for each gateway individually would be more restrictive than one set for a combination of locations. A combined gateway trip target would imply that the NBS gateways operate as a system, such that as one gateway reaches capacity traffic will shift to other gateways.

Initially, the 2014 NBPP vehicle trip target policy focused only on the inbound direction of travel during the morning 3-hour peak period, for each gateway individually (e.g., San Antonio, Rengstorff, and Shoreline). The 2017 NBPP modified that policy and established vehicle trip targets for each gateway individually, based on two-way volumes (i.e., both directions of travel combined), for the morning peak hour and the evening peak hour. Per the recommendations of the 2021 North Bayshore Circulation Feasibility Study (2021 Circulation Study), City staff is now working to amend the 2017 NBPP to modify the trip targets as gateway transportation improvements are constructed. Specifically, the 2021 Circulation Study recommended changing the vehicle trip target to a directional inbound morning 3-hour peak period and outbound evening 3-hour peak period for Shoreline Boulevard and Rengstorff Avenue combined.

Observed Gateway Vehicle Volumes
As part of the Fall 2022 traffic monitoring, daily traffic counts at ten roadway locations throughout North Bayshore (including the gateways) were collected from Monday to Friday between October 17th and October 28th, 2022 (refer to Attachment A for the counts and count location). Due to construction activities, data collection at the following locations and dates was disrupted.

Additional days of counts were collected during the following week to compensate for the disrupted data.
• Data collection was disrupted at Rengstorff Avenue between 101 northbound ramps and Garcia Avenue northbound and southbound during the entire data collection period.

Additional data was collected at these locations from Tuesday, November 15th to Thursday, November 17th and on Tuesday, November 29th.
• Data collection was disrupted at San Antonio Road between Bayshore Parkway and Casey Avenue southbound on Wednesday, October 26th and Thursday, October 27th. Additional Ben Pacho
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data was collected at this location on Wednesday, November 2nd and Thursday, November 3rd.
• Data collection was disrupted at Shoreline Boulevard north of La Avenida northbound on Wednesday, October 26th and Thursday, October 27th. Additional data was collected at this location on Wednesday, November 2nd and Thursday, November 3rd.

The morning and evening peak hour and 3-hour peak period vehicle volumes of the North Bayshore gateways is presented below in Table 2. The reported gateway volumes are the average of the six mid-weekday counts. Attachment B shows the gateway hourly vehicle totals average by direction.

Table 2: Gateway Volumes – Fall 20221,2
Gateway
Morning Evening
Inbound Outbound Total Inbound Outbound Total
Peak Hour
San Antonio Road 450 150 610 260 460 720
Rengstorff Avenue 1,580 300 1,880 320 1,210 1,530
Shoreline Boulevard 1,860 590 2,450 640 1,960 2,600
Total 3,890 1,040 4,940 1,220 3,630 4,850
3-Hour Peak Period
San Antonio Road 1,210 460 1,670 680 1,060 1,740
Rengstorff Avenue 3,740 880 4,620 1,040 3,550 4,590
Shoreline Boulevard 5,040 1,700 6,740 1,890 5,130 7,020 Total 9,990 3,040 13,030 3,610 9,740 13,350
Notes:

1. Vehicle volumes rounded to nearest 10.

2. Vehicle volumes represent October/November 2022 conditions.

Source: Fehr & Peers, 2023.

The volume reported in the monitoring is an average of a multiday observation in Table 2. We report the average because there is some natural day-to-day variation in traffic volumes. The reader can refer to the detailed summary of the minimum and maximum volumes by direction for each gateway in Attachment C, which also include the range of the variation, expressed as a percentage of the minimum and maximum volumes from the average traffic during morning and evening peak hour and 3-hour peak period vehicle volumes.

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At San Antonio and Rengstorff gateways during the morning peak hour the two-way day-to-day variation is +/- 5 percent, while the Shoreline gateway variation is less than +/- 10 percent during the morning peak hour. The combined gateways day-to-day variation during the morning peak hour is +/- 10 percent. In the evening peak hour, the two-way day-to-day variation is similar at each gateway and is +/- 15 percent across the combined gateways.

In the morning peak period, the combined gateways day-to-day variation is +/- 15 percent, while during the evening peak period it is +/- 20 percent. To put these observations in context, a general rule-of-thumb is that the observed traffic volume on a given street segment can vary by +/- 10 percent from one day to the next. The fact that the observed variations are similar to this rule-of-thumb is an indication that the vehicle volumes are not close to the gateway capacity and day-to-day variation is reflective of travel preferences of drivers.

Gateway Queuing Observations
As part of the monitoring effort, vehicle queues were recorded using cameras at t he inbound and outbound approaches of the Rengstorff Avenue and Shoreline Boulevard gateways. Vehicle queues increase under conditions where gateway traffic exceeds capacity. Noting the extent of the queues and times at which the queues begin to increase and decrease in size can help in understanding the North Bayshore Gateway operations throughout the morning and evening peak periods. These queuing observations are summarized in Attachment D.

Short vehicle queues were observed and all vehicle traffic is served in one intersection signal cycle. A standing queue did not form. A standing queue forms when vehicle traffic requires more than one intersection signal cycle to be served. Unlike during congested conditions of previous monitoring reports, the observed vehicle volume is well below the gateway capacity and arriving vehicles are served in one signal cycle.

Gateway Trip Target Evaluation
This section compares the Fall 2022 volumes to the 2021 Circulation Study directional trip targets, and Table 3 presents the results for the morning and evening peak period, which is the focus of the Circulation Study.

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Table 3: North Bayshore Gateway Trip Cap Policy Evaluation: Circulation Study Targets
Gateway
Inbound Morning Peak Period Outbound Evening Peak Period Volume1 Trip Cap1,2 Remaining
Trip cap
Percent of
Trip Cap
Remaining
Volume1 Trip Cap1,2 Remaining
Trip Cap
Percent of
Trip Cap
Remaining
Individual Gateways
San Antonio Road 1,210 4,140 2,930 71% 1,060 3,620 2,560 71% Rengstorff Avenue 3,740 8,880 5,140 58% 3,550 7,140 3,590 50% Shoreline Boulevard 5,040 7,470 2,430 33% 5,130 8,190 3,060 37% Combined Gateway3
Total 9,990 20,490 10,500 51% 9,740 18,950 9,210 49%
Gateway Trip Cap Comparison
Shoreline Boulevard
& Rengstorff Avenue 8,780 16,350 7,570 46% 8,680 15,330 6,650 43% Notes:

1. Vehicle volumes rounded to nearest 10.

2. San Antonio gateway trip cap based on 2014 NBPP, and Rengstorff Avenue and Shoreline Boulevard gateway trip caps based on 2021 Circulation Study.

3. The combined gateways are the sum of the San Antonio Road, Rengstorff Avenue, and Shoreline Boulevard gateways.

Source: Fehr & Peers, 2023.

From Table 3, the comparison shows that, both for the individual gateways and for the combined gateways, the volume is less than the trip target during all peak periods. For the recommended North Bayshore Trip Cap Policy at Shoreline Boulevard and Rengstorff Avenue combined, the vehicle volume is less than the trip target during both peak periods and in compliance with the North Bayshore Trip Cap Policy.

Historic Gateway Volume Trend
The trip cap monitoring volumes at the gateways has been reported as the mid-week workday averages (Tuesday to Thursday), because both Mondays and Fridays tend to experience different commute patterns than the mid-week workdays. To show the degree of variation, the Tuesday-to- Thursday average has been compared to Monday-to-Thursday and Monday-to-Friday averages over the past five years. The historic volume summary covers:

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• Table 4 is the morning peak hour inbound vehicle volumes • Table 5 is the evening peak hour outbound vehicle volumes • Table 6 is the morning peak period inbound vehicle volumes • Table 7 is the evening peak period outbound vehicle volumes • Table 8 is the daily two-way vehicle volumes
Attachment E includes figures showing the historic trend of the vehicle volumes for each average method.

For all the time periods reported, Tuesday-to-Thursday averages are the highest for each gateway and for the combined gateway total across all years. Monday-to-Friday averages are generally the lowest, but there are some exceptions where it is similar to or higher than the Monday-to- Thursday averages.

The difference among the three averaging methods was relatively minor in the years before COVID-19 (from Fall 2017 to Spring 2020) as overall vehicle demand was consistently high on all weekdays and vehicle demand was similar to the gateway capacity during some time periods. The percentage differences for peak hour, peak period and daily between the averaging methods are within 5% before COVID-19. The two monitoring periods (Fall 2021 and Spring 2022) have slightly higher variability but most percentages differences are within 5%.

However, in these most recent observations from Fall 2022, there is a noticeably greater variability between the three averaging methods, reflecting a pattern where there are much lower vehicle volumes on Mondays and Fridays than on the three mid-week days. This is likely a reflection of a new “hybrid” work pattern in which employees are more likely to work from home on Mondays and/or Fridays than on the mid-week days.

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Table 4: Morning Peak Hour Inbound Vehicle Volumes Over Time1 Gateway Fall
2017
Spring
2018
Fall
2018
Spring
2019
Fall
2019
Spring
2020
Fall
20202
Spring
20212
Fall
2021
Spring
2022
Fall
2022
Peak Hour 8:45 AM to
9:45 AM
8:45 AM to
9:45 AM
9:00 AM to
10:00 AM
9:00 AM to
10:00 AM
9:00 AM to
10:00 AM
9:00 AM to
10:00 AM - - 8:45 AM to
9:45 AM
8:30 AM to
9:30 AM
9:15 AM to
10:15 AM
Tuesday through Thursday
San Antonio Road 1,130 1,140 1,270 1,280 1,350 1,350 - - 260 1,060 450 Rengstorff Avenue 2,420 2,310 2,320 2,400 2,290 2,480 - - 550 590 1,580 Shoreline Boulevard 2,240 2,480 2,320 2,270 2,330 2,480 - - 1,110 1,050 1,860 Total [A] 5,790 5,930 5,910 5,950 5,970 6,310 - - 1,920 2,700 3,890 Monday through Thursday
San Antonio Road 1,130 1,080 1,270 1,260 1,290 1,350 - - 240 1,130 410 Rengstorff Avenue 2,380 2,300 2,320 2,400 2,270 2,470 - - 530 480 1,340 Shoreline Boulevard 2,240 2,470 2,330 2,280 2,300 2,460 - - 1,070 1,030 1,690 Total [B] 5,750 5,850 5,920 5,940 5,860 6,280 - - 1,840 2,640 3,440 Monday through Friday
San Antonio Road 1,080 1,000 1,170 1,190 1,220 1,270 - - 240 1,110 370 Rengstorff Avenue 2,380 2,280 2,300 2,370 2,250 2,430 - - 520 460 1,260 Shoreline Boulevard 2,230 2,450 2,330 2,280 2,280 2,440 - - 1,050 1,010 1,590 Total [C] 5,690 5,730 5,800 5,840 5,750 6,140 - - 1,810 2,580 3,220 Comparisons to Tuesday through Thursday Average Counts
Total [D = A-B]
Percent [E= D/A*100]
40 (1%)
80 (1%)
-10
(<1%)
10 (<1%)
110
(2%)
30 (<1%) - - 70
(4%)
60 (2%)
450
(12%)
Total [F = A-C]
Percent [G= F/A*100]
100
(2%)
200
(3%)
110
(2%)
110
(2%)
220
(4%)
170
(3%) - - 100
(6%)
120
(4%)
670
(17%)
Note:

1. Vehicle volumes rounded to nearest 10.

2. No monitoring was conducted in the Fall 2020 and Spring 2021 due to minimal travel during COVID-19 shelter-in-place order.

Source: Fehr & Peers, 2023.

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Table 5: Evening Peak Hour Outbound Vehicle Volumes Over Time1 Gateway Fall
2017
Spring
2018
Fall
2018
Spring
2019
Fall
2019
Spring
2020
Fall
20202
Spring
20212
Fall
2021
Spring
2022
Fall
2022
Peak Hour 5:00 PM to
6:00 PM
5:00 PM to
6:00 PM
4:45 PM to
5:45 PM
4:45 PM to
5:45 PM
5:00 PM to
6:00 PM
5:00 PM to
6:00 PM - - 5:00 PM to
6:00 PM
5:00 PM to
6:00 PM
5:00 PM to
6:00 PM
Tuesday through Thursday
San Antonio Road 860 840 880 800 830 850 - - 200 250 460 Rengstorff Avenue 1,630 1,740 1,780 1,860 1,940 2,020 - - 600 640 1,210 Shoreline Boulevard 2,370 2,310 2,280 2,340 2,360 2,410 - - 1,130 1,160 1,960 Total [A] 4,860 4,890 4,940 5,000 5,130 5,280 - - 1,930 2,050 3,630 Monday through Thursday
San Antonio Road 850 820 870 800 620 840 - - 200 240 440 Rengstorff Avenue 1,620 1,720 1,760 1,830 1,920 2,020 - - 590 600 1,060 Shoreline Boulevard 2,350 2,290 2,280 2,360 2,350 2,420 - - 1,080 1,120 1,820 Total [B] 4,820 4,830 4,910 4,990 4,890 5,280 - - 1,870 1,960 3,320 Monday through Friday
San Antonio Road 810 760 790 770 830 790 - - 200 240 440 Rengstorff Avenue 1,610 1,710 1,750 1,810 1,890 1,980 - - 560 590 720 Shoreline Boulevard 2,310 2,260 2,270 2,360 2,310 2,410 - - 1,060 1,080 1,630 Total [C] 4,730 4,730 4,810 4,940 5,030 5,180 - - 1,820 1,910 2,790 Comparisons to Tuesday through Thursday Average Counts
Total [D = A-B]
Percent [E= D/A*100]
40 (1%)
60 (1%)
30 (1%)
10 (<1%)
240
(5%)
0 (0%) - - 60
(3%)
90 (4%)
310
(9%)
Total [F = A-C]
Percent [G= F/A*100]
130
(3%)
160
(3%)
130
(3%)
60 (1%)
100
(2%)
100
(2%) - - 110
(6%)
140
(7%)
840
(23%)
Note:

1. Vehicle volumes rounded to nearest 10.

2. No monitoring was conducted in the Fall 2020 and Spring 2021 due to minimal travel during COVID-19 shelter-in-place order.

Source: Fehr & Peers, 2023.

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Table 6: Morning Peak Period Inbound Vehicle Volumes Over Time1 Gateway Fall
2017
Spring
2018
Fall
2018
Spring
2019
Fall
2019
Spring
2020
Fall
20202
Spring
20212
Fall
2021
Spring
2022
Fall
2022
Peak Period 8:00 AM to
11:00 AM
8:00 AM to
11:00 AM
8:00 AM to
11:00 AM
8:00 AM to
11:00 AM
8:00 AM to
11:00 AM
8:00 AM to
11:00 AM - - 7:45 AM to
10:45 AM
8:00 AM to
11:00 AM
8:15 AM to
11:15 AM
Tuesday through Thursday
San Antonio Road 2,530 2,580 2,840 2,930 3,140 3,120 - - 700 3,060 1,210 Rengstorff Avenue 5,670 5,440 5,680 5,970 5,800 6,130 - - 1,310 1,340 3,740 Shoreline Boulevard 6,300 6,750 6,530 6,440 6,590 7,220 - - 2,920 2,950 5,040 Total [A] 14,500 14,770 15,050 15,340 15,530 16,470 - - 4,930 7,350 9,990 Monday through Thursday
San Antonio Road 2,520 2,430 2,820 2,900 2,970 3,100 - - 660 2,990 1,100 Rengstorff Avenue 5,600 5,410 5,650 5,930 5,750 6,110 - - 1,270 1,300 3,200 Shoreline Boulevard 6,290 6,670 6,520 6,410 6,540 7,160 - - 2,800 2,720 4,650 Total [B] 14,410 14,510 14,990 15,240 15,260 16,370 - - 4,730 7,010 8,950 Monday through Friday
San Antonio Road 2,440 2,350 2,600 2,770 2,850 2,930 - - 660 2,980 1,020 Rengstorff Avenue 5,550 5,320 5,600 5,840 5,650 5,980 - - 1,250 1,270 3,040 Shoreline Boulevard 6,210 6,640 6,490 6,380 6,470 7,070 - - 2,780 2,720 4,400 Total [C] 14,200 14,310 14,690 14,990 14,970 15,980 - - 4,690 6,970 8,460 Comparisons to Tuesday through Thursday Average Counts
Total [D = A-B]
Percent [E= D/A*100]
90 (1%)
260
(2%)
60 (<1%)
100
(1%)
270
(2%)
100
(1%) - - 200
(4%)
340
(5%)
1,040
(10%)
Total [F = A-C]
Percent [G= F/A*100]
300
(2%)
460
(3%)
360
(2%)
350
(2%)
560
(4%)
490
(3%) - - 240
(5%)
380
(5%)
1,530
(15%)
Note:

1. Vehicle volumes rounded to nearest 10.

2. No monitoring was conducted in the Fall 2020 and Spring 2021 due to minimal travel during COVID-19 shelter-in-place order.

Source: Fehr & Peers, 2023.

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Table 7: Evening Peak Period Outbound Vehicle Volumes Over Time1 Gateway Fall
2017
Spring
2018
Fall
2018
Spring
2019
Fall
2019
Spring
2020
Fall
20202
Spring
20212
Fall
2021
Spring
2022
Fall
2022
Peak Period 4:00 PM to
7:00 PM
4:15 PM to
7:15 PM
4:00 PM to
7:00 PM
4:00 PM to
7:00 PM
4:00 PM to
7:00 PM
4:00 PM to
7:00 PM - - 3:00 PM to
6:00 PM
4:00 PM to
7:00 PM
4:00 PM to
7:00 PM
Tuesday through Thursday
San Antonio Road 2,070 1,890 2,210 1,940 1,990 2,090 - - 560 590 1,060 Rengstorff Avenue 4,370 4,640 4,810 4,810 5,060 5,150 - - 1,520 1,540 3,550 Shoreline Boulevard 6,380 6,270 6,370 6,300 6,500 6,750 - - 3,080 3,110 5,130 Total [A] 12,820 12,800 13,390 13,050 13,550 13,990 - - 5,160 5,240 9,740 Monday through Thursday
San Antonio Road 2,040 1,860 2,190 1,930 1,480 2,070 - - 560 600 1,030 Rengstorff Avenue 4,340 4,600 4,760 4,760 5,030 5,140 - - 1,470 1,490 3,120 Shoreline Boulevard 6,330 6,200 6,340 6,400 6,450 6,720 - - 2,940 3,030 4,770 Total [B] 12,710 12,660 13,290 13,090 12,960 13,930 - - 4,970 5,120 8,920 Monday through Friday
San Antonio Road 1,960 1,820 2,000 1,860 1,990 1,950 - - 550 590 960 Rengstorff Avenue 4,290 4,480 4,700 4,730 4,950 5,040 - - 1,430 1,470 2,990 Shoreline Boulevard 6,280 6,140 6,340 6,440 6,330 6,680 - - 2,940 2,930 4,540 Total [C] 12,530 12,440 13,040 13,030 13,270 13,670 - - 4,920 4,990 8,490 Comparisons to Tuesday through Thursday Average Counts
Total [D = A-B]
Percent [E= D/A*100]
110
(1%)
140
(1%)
100
(1%)
-40
(<0%)
590
(4%)
60 (<1%) - - 190
(4%)
120
(2%)
820
(8%)
Total [F = A-C]
Percent [G= F/A*100]
290
(2%)
360
(3%)
350
(3%)
20 (<1%)
280
(2%)
320
(2%) - - 240
(5%)
250
(5%)
1,250
(13%)
Note:

1. Vehicle volumes rounded to nearest 10.

2. No monitoring was conducted in the Fall 2020 and Spring 2021 due to minimal travel during COVID-19 shelter-in-place order.

Source: Fehr & Peers, 2023.

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Table 8: Daily Two-Way Vehicle Volumes Over Time1
Gateway Fall
2017
Spring
2018
Fall
2018
Spring
2019
Fall
2019
Spring
2020
Fall
20202
Spring
20212
Fall
2021
Spring
2022
Fall
2022
Tuesday through Thursday
San Antonio Road 10,770 10,620 11,720 10,740 10,920 12,360 - - 4,650 14,210 7,170 Rengstorff Avenue 22,690 23,560 25,390 24,440 25,790 25,830 - - 9,160 9,490 18,410 Shoreline Boulevard 38,370 40,120 38,930 36,820 39,780 40,180 - - 22,020 21,650 31,100 Total [A] 71,830 74,300 76,040 72,000 76,490 78,370 - - 35,830 45,350 56,680 Monday through Thursday
San Antonio Road 10,620 10,210 11,660 10,730 10,520 12,230 - - 4,580 13,910 6,940 Rengstorff Avenue 22,370 23,200 24,820 24,110 25,220 25,500 - - 8,830 9,220 16,490 Shoreline Boulevard 37,790 39,730 38,380 36,210 38,910 39,400 - - 21,210 20,930 29,420 Total [B] 70,780 73,140 74,860 71,050 74,650 77,130 - - 34,620 44,060 52,850 Monday through Friday
San Antonio Road 10,580 9,920 10,980 10,670 10,500 11,920 - - 4,580 13,980 6,650 Rengstorff Avenue 22,810 22,880 24,500 23,990 25,650 25,110 - - 8,780 9,170 15,960 Shoreline Boulevard 38,750 39,950 38,600 36,790 39,530 39,550 - - 21,680 21,000 29,150 Total [C] 72,140 72,750 74,080 71,450 75,680 76,580 - - 35,040 44,150 51,760 Comparisons to Tuesday through Thursday Average Counts
Total [D = A-B]
Percent [E= D/A*100]
1,050
(1%)
1,160
(2%)
1,180
(2%)
950
(1%)
1,840
(2%)
1,240
(2%) - - 1,210
(3%)
1,290
(3%)
3,830
(7%)
Total [F = A-C]
Percent [G= F/A*100]
-310
(<0%)
1,550
(2%)
1,960
(3%)
550
(1%)
810
(1%)
1,790
(2%) - - 790
(2%)
1,200
(3%)
4,920
(9%)
Note:

1. Vehicle volumes rounded to nearest 10.

2. No monitoring was conducted in the Fall 2020 and Spring 2021 due to minimal travel during COVID-19 shelter-in-place order.

Source: Fehr & Peers, 2023.

Ben Pacho
March 1, 2023

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The overall total gateway volumes remain substantially lower than the typical pre -COVID values, although volumes have increased compared to the Spring 2022 observations. Compared to Spring 2022, Fall 2022 total volumes grew by 44% for Tuesday to Thursday average morning inbound peak hour and by 77% during evening outbound peak hour. During peak periods, morning inbound volumes grew by 36%, and evening outbound volumes grew by 86%. Table 9 shows the comparison between Spring 2022 and Fall 2022 volumes.

Table 9: Gateway Volume Comparison between Spring 2022 and Fall 2022 Year
Morning Evening
Inbound Outbound Total Inbound Outbound Total
Peak Hour
Spring 2022 [A] 2,700 710 3,410 1,450 2,050 3,500
Fall 2022 [B] 3,890 1,040 4,930 1,220 3,630 4,850
Difference [C] = [B-A] 1,190 330 1,520 -230 1,580 1,350 % Difference [C/A] 44% 46% 45% -16% 77% 39%
Peak Period
Spring 2022 [A] 7,350 2,100 9,450 4,010 5,240 9,250
Fall 2022 [B] 9,990 3,040 13,030 3,610 9,740 13,350
Difference [C] = [B-A] 2,640 940 3,580 -400 4,500 4,100 % Difference [C/A] 36% 45% 38% -10% 86% 44%
Note: Vehicle volumes rounded to nearest 10.

Source: Fehr & Peers, 2023.

Mode Share
To get to and from the North Bayshore area, people can choose to drive alone, carpool, take transit, bike, or walk. To enhance non-drive-alone choices, employers in North Bayshore have been using transportation demand management (TDM) programs that offer transit passes, employee shuttles, active transportation (bicycling and walking) incentives, carpool/vanpool incentives, and other methods to reduce daily commute stress on their employees and to reduce the number of single-occupant vehicle (SOV) trips. The City has set a person mode share target of no more than 45% SOV (of all person trips) usage at the North Bayshore gateways. Below is a summary of the mode share for travel across all gateways combined and at each individual gateway. The mode share analysis below does not include transportation network company (TNC) Ben Pacho
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(e.g., Uber, Lyft, etc.) drivers. Attachment E summarizes the mode share without and with TNC drivers.

Peak Hour Mode Share
This section describes the vehicle and person mode share for all gateways combined and each gateway separately, for the morning peak hour (9:15 AM to 10:15 AM) and the evening peak hour (5:00 PM to 6:00 PM).

Table 10: Existing Morning Inbound Peak Hour Mode Share for Vehicles and Persons, All Gateways Combined
Mode Vehicle Percentage
Person Percentage
(excludes TNC
drivers)
Vehicle
Volume
Person Volume
(excludes TNC
drivers)
SOV1 86% 69% 3,512 3,501
HOV1 6% 10% 234 478
Transit 3% 17% 137 868
Bike 4% 3% 172 172
Ped 1% 1% 45 45
Total 100% 100% 4,100 5,064
Notes:

1. Transportation network companies (TNC) (e.g., Uber, Lyft, etc.) were observed by vehicle occupancy (1 person, 2 persons, 3 persons, and 4+persons). The driver was not considered a part of the person volume; therefore, TNC1 = 0 persons per vehicle; TNC2 = 1 person per vehicle; TNC3 = 2 person per vehicle; and TNC 4 = 3 persons per vehicle.