Transportation Engineers

3853 Taylor Road, Suite G • Loomis, CA 95650 • (916) 660-1555 • FAX (916)660-1535

June 21, 2018 Ms. Cybil Bryant

BUZZ OATES CONSTRUCTION, INC.

8615 Elder Creek Road

Sacramento, CA 95828

RE: TRAFFIC IMPACT ASSESSMENT FOR MACE BLVD / ALHAMBRA DRIVE

TENTATIVE PARCEL MAP PROJECT, DAVIS, CA

Dear Ms. Bryant:

As requested, KD Anderson & Associates, Inc. has completed our assessment of the potential traffic

impacts associated with the Mace Blvd / Alhambra Drive Project (Tentative Map 5144). As we have

discussed, the project is a 65,000 sf business park combining office, R&D and limited retail uses on a 6-

acre site located on Mace Blvd the northwest corner of its intersection with Alhambra Drive / Mace Blvd

intersection in east Davis. The site has been previously approved for development in 2006 as a 70,000 sf

retail shopping center, although other site development proposals have come forward since then, most

recently as a 56 ksf office / medical office / retail center. The site currently has Neighborhood Retail

General Plan land use designation, and a change to a lower trip generating Business Park designation is

proposed.

Approach to Assessment

Because the current proposal and the proposed land use designation generates potentially less traffic than

the approved and designated uses, a focused approach to traffic impact assessment is applicable, including

the following elements:

Trip Generation. Daily, a.m. and p.m. peak hour trip generation forecasts have been made for the site

under current and previously approved plans, and under the current General Plan designation. The

relative difference in trip generation was identified.

Travel Characteristics. The share of project trips likely to be made by pedestrians, bicyclists and transit

users was identified. The directional distribution of vehicle trips was identified, and the assignment of

project trips via proposed driveways was determined.

Background Traffic Conditions. Current peak hour operating Levels of Service at the Mace Blvd /

Alhambra Drive intersection were identified based on available information. Long term cumulative

conditions were also described assuming community build out under the General Plan and with other

pending development projects based on available information.

Impact Assessment based on Level of Service. The extent to which the addition of project trips may

result in increased traffic and operating conditions in excess of adopted City of Davis minimum standards

at the Mace Blvd / Alhambra Blvd intersection was assessed. Forecast cumulative traffic conditions were

reviewed and the extent to which improvements are needed was considered.

Ms. Cybil Bryant

Traffic Impact Assessment for Mace Blvd / Alhambra Drive Tentative Parcel Map Project, Davis, Ca

June 21, 2018

Page 2

Impact Assessment based on Site Access. The feasibility of proposed left turn access from Mace Blvd

was reviewed based on left turn storage requirements for the lane and for the Mace Blvd / Alhambra

Drive intersection.

Trip Generation

The development of the project site project will generate travel to and from the project site. The amount

of additional traffic on a particular section of the street network depends on three factors:

Trip Generation, the number of new person trips that would be generated by the project,

Modal Choice , the share of site traffic made by private automobiles, by walking, by bicycle or

transit,

Trip Distribution and Assignment, the direction of travel and specific routes that the new vehicle

trip would take.

Vehicle trip generation is determined by identifying the type and size of land use being developed and

applying applicable trip generation rates to this information. Recognized sources of trip generation rate

data are used to calculate the total number of projected trip ends. This includes City-derived data from

the current city-wide traffic model or other City information as well trip generation rates from the

Institute of Transportation Engineers (ITE) publication Trip Generation Manual, 10th Edition.

Approved Project. The trip generation rates used in this analysis and the results for the approved project

are presented in Table 1. The approved project is expected to generate an estimated 4,235 vehicle trips

per day. Some of the trips based on nationally derived ITE rates would likely be made on foot, by bicycle

or by transit in Davis, and a reduction in vehicles trip was made based on available data. The Draft

Environmental Impact Report (DEIR) for the Cannery Park project identified an 8% reduction for

bicyclists and pedestrians and a 4% reduction for transit users. The site is located along a Unitrans route

and is adjacent to the City’s comprehensive bikeway network. As the project is located adjacent to

bicycle lanes and along Unitrans routes these reduction rates were considered. Since the project is located

in the east end of the City the 8% rate was reduced to 4% as it is expected that fewer residents will bike to

the project. After accounting for modal choice the approved retail project would generate 113 a.m. peak

hour trips and 265 new p.m. peak hour trips.

Proposed Project. The trip generation forecast for the proposed project is shown in Table 2. As

indicated, we considered a variety of rates associated with the various uses that might be allowed on the

site. The City traffic model’s rate for Office and Retail yield the greatest number of daily trips, and that

total is similar to, but lightly higher than forecasts derived from the model’s Business Park / Research &

Development rate. The ITE rates for Office and Retail also yield the greatest number of peak hour trips.

After accounting for modal choice, the project could generate 978 daily trips, with 82 a.m. peak hour and

74 p.m. peak hour trips. Because the project’s estimate is less than or similar to the approved project, its

traffic impacts would be similar or less that those associated with that use.

Ms. Cybil Bryant

Traffic Impact Assessment for Mace Blvd / Alhambra Drive Tentative Parcel Map Project, Davis, Ca

June 21, 2018

Page 3

TABLE 1

PREVIOUSLY APPROVED PROJECT TRIP GENERATION

Land Use (Code) Amount

Daily

Rate

Daily

Trips

AM Peak Hour PM Peak Hour

Rate % In % Out In Out Total Rate % In % Out In Out Total

Retail (820) 70.0 ksf 60.50 A 4,235 2.67 B 62% 38% 116 71 187 5.96 B 48 52% 200 217 417

Less Pass By 34% n.a. 39 25 64 68 74 142

New Trips 4,235 77 46 123 132 143 275

Trip Reductions

Walking / Biking (4%) (3) (2) (5) (4%) (2) (3) (5)

Transit (4%) (3) (2) (5) (4%) (2) (3) (5)

New Trip – Total 4,235 71 42 113 128 137 265

ksf – thousand square feet. Sum of values may not equal due to rounding A - City Travel Demand Model rate B Trip generation equation used per ITE, 10th Edition

Ms. Cybil Bryant

Traffic Impact Assessment for Mace Blvd / Alhambra Drive Tentative Parcel Map Project, Davis, Ca

June 21, 2018

Page 4

TABLE 2

PROPOSED PROJECT TRIP GENERATION

Land Use / Code Amount

Daily

Rate

Daily

Trips

AM Peak Hour PM Peak Hour

Rate % In % Out In Out Total Rate % In % Out In Out Total

General Office ( 710) 63 ksf 17.5 A

847 1.36 B

86% 14% 74 12 86 1.17 B

16% 84% 12 62 74

Research & Development

(760) 63 ksf - - 0.42

C 75% 25% 19 6 25 0.72

B 15% 85% 20 25 45

Business Park (770) 6 acres 149.9A

899 0.40C

61% 39%

63 ksf - 0.40 61% 39% 15 10 25 0.42C

46% 54% 12 24 26

Retail (820) 2.00 ksf 60.5A

131 0.94C

62% 38% 1 1 2 3.81 48% 52% 4 4 8

New Trips – Sub Total 978 75 13 88 16 66 82

Trip Reductions

Walking / Biking (4%) (3) (1) (3) (4%) (1) (3) (3)

Transit (4%) (3) (1) (3) (4%) (1) (3) (3)

New Trip – Total 978 69 11 82 14 60 74

ksf – thousand square feet. Sum of values may not equal due to rounding A - City Travel Demand Model rate B - Trip generation equation used per ITE Trip Generation Manual, 10th Ed, 2017 C - Average rate used per ITE Trip Generation Manual, 10th Ed.

Ms. Cybil Bryant

Traffic Impact Assessment for Mace Blvd / Alhambra Drive Tentative Parcel Map Project, Davis, Ca

June 21, 2018

Page 5

Travel Characteristics

Trip Distribution. The geographic distribution of vehicle trips associated with the approved and

proposed projects was determined based on the local knowledge of the City. Fifty percent of the trips are

estimated to come from either I-80 or south Davis. The remaining trips are projected to be split

approximately 30% via Covell Blvd to the north west and 20% via 5th Street.

Trip Assignment. The project trip assignment that would be generated by the proposed Alhambra Place

project is shown in Figure 1. Of the total trips generated by the project 46 a.m. peak hour trips and 41

p.m. peak hour trips are projected to travel through the Mace Blvd. / Alhambra Drive intersection.

Background Traffic Conditions

Mace Blvd / Alhambra Drive Intersection. The Mace Blvd / Alhambra Drive intersection is a signal

controlled “tee” intersection. Mace Blvd has a single northbound through lane and two southbound

through lanes at this intersection. The northbound approach provides a 250’± left turn lane with protected

left phasing. Separate “free” right turn lanes exist for the southbound and eastbound approaches. For

both movements, the vehicles departing the intersection are not required to yield to through movement

vehicles as they enter their own lane as the turn is completed.

Current Operating Levels of Service. The most recent information regarding intersections on the Mace

Blvd corridor comes from the Mace Ranch Innovation Center (MRIC) DEIR. As noted in Table 3, that

document indicated that after accounting for the overall effects of coordinated operation of signals along

the corridor, the Alhambra Drive intersection operates at LOS A in the a.m. and p.m. peak hour. These

conditions satisfy the City’s minimum LOS E standard. Current traffic peak hour volumes at the

intersection are shown in Attachment 1.

Background Cumulative Traffic Conditions. The MRIC DEIR and FEIR provide information

regarding future cumulative traffic conditions. That document considered multiple background

conditions (i.e., Cumulative, CEQA Cumulative and Modified Cumulative, all with and without the

MRIC. The results of that analysis are also presented in Table 3.

As noted in the MRIC EIR documents, the Mace Blvd / Alhambra Drive intersection operates acceptably,

at LOS E or better, under both CEQA Cumulative without and with MRIC scenarios. The intersection

will continue to operate acceptably under the Modified Cumulative without MRIC scenario, at LOS B or

better. Under the Modified Cumulative with MRIC scenario the intersection will operate below the City’s

LOS threshold, at LOS F. The mitigations identified in the MRIC EIR are dependent on the alternative

option. Under Options 1 and 2, installation of a second southbound left turn lane and installation of a

northbound shared through-right lane and northbound right turn lane between 2nd

Street and Alhambra

Drive will result in the intersection operating at LOS E or better. Under Option 3, the intersection would

require addition of an eastbound left-turn lane, re-striping the eastbound shared through-left lane to a

shared through-right lane and re-striping the dedicated northbound right-turn lane to a shared through-

right lane is needed for the intersection to operate at LOS E or better. It is noted that the projects

contained within the Modified Cumulative plus project alternative have either been delayed or abandoned.

The delayed projects will require a supplemental EIR that will further analyze this intersection.

PROJECTLOCATION

(1) 5

(3) 1

6

1 (0

)

13 (3

)

(15) 3

PROJECTLOCATION

(15) 3

(1) 5

13 (3

)

21 (4

)

(3) 1

(15) 3PROJECTLOCATION

(15) 2

17 (3)

9 (2)

(0) 4

PROJECTLOCATION

(5) 2

(25) 4 9 (2)

0 (2)

2 (13)

(3) 14

Legend

AM Peak Hour VolumeXX

PM Peak Hour Volume(XX)

N.T.S.

figure 1

PROJECT ONLY PEAK HOUR TRIPS

5015-21 RA 6/15/2018

KD Anderson & Associates, Inc.Transportation Engineers

Ms. Cybil Bryant

Traffic Impact Assessment for Mace Blvd / Alhambra Drive Tentative Parcel Map Project, Davis, Ca

June 21, 2018

Page 7

TABLE 3 BACKGROUND LEVEL OF SERVICE CONDTIONS

AT MACE BLVD / ALHAMBRA DRIVE INTERSECTION

Condition

AM Peak Hour PM Peak Hour

Average Delay

(sec/veh) LOS

Average Delay

(sec/veh) LOS

Existing 4 A 5 A

CEQA Cumulative without MRIC 11 B 55 D

CEQA Cumulative with MRIC 46 D 78 E

Modified Cumulative without MRIC 10 A 11 B

Modified Cumulative with MRIC 86 F 72 E

Assessment

Existing Plus Project Impacts. The Mace Blvd / Alhambra Drive currently operates at LOS A. There is

latent capacity for this intersection to accommodate additional traffic, and it is our opinion that the

relatively small amount of additional traffic accompanying this use will not have a significant impact;

therefore mitigation is not required.

Cumulative Impacts. The site was previously approved for development and its traffic would already be

included in the long term cumulative traffic analyses that have accompanied development proposals in

Davis, including the MRIC. The project generates fewer trips than the approved use, making the

contribution to cumulative conditions less. The cumulative impacts associated with this project,

therefore, would be similar to, or less than those previously addressed.

Summary Conclusions

The Mace Blvd / Alhambra Drive intersection currently operates at a Level of Service that is well above

the City’s minimum LOS E standard, at LOS A. The small amount of additional traffic accompanying

this use will not have a significant impact on the intersection; therefore, there is no mitigation required.

Because the site was previously approved for development its traffic has been included in the long term

cumulative traffic analyses that have accompanied development proposals in Davis, including the MRIC.

The project generates fewer trips than the existing approved use, and its contribution to cumulative

conditions would be less. The cumulative impacts associated with this project, therefore, would be

similar to, or less than those previously addressed.

Thank you for your attention to this information

Sincerely, KD Anderson & Associates, Inc. Kenneth D. Anderson, P.E., President Attachments