234 Edmonds - Traffic Engineering Resub Memo.pdfTENW
Transportation Engineering NorthWest
MEMORANDUM
DATE: April 16, 2018
TO: Brad Shipley, Associate Planner
City of Edmonds
FROM: Michael Read, PE, Principal, TENW
SUBJECT: JTMadi5on Apartments - 23326 Highway 99 (PLN2018001 2)
Response to City Comments on Traffic Impact Study - TENW Project No. 3581
This memorandum provides a response to a City Comments for the JT Madison Apartments at
23326 Highway 99 project issued by the City of Edmonds on April 10, 2018 related to a
proposed residential project. A number of clarifications/corrections were identified for the
following documents:
Traffic Scoping Memorandum dated lanuac� 17, 2018:
1 . Please state the Location used for ITE Land Use 22 1
Response : Trip Generation Manual, 1 01h Edition, 2017 was applied for this project. The
locations and number of studies locations are provided in Attachment A.
2. Confirm that the land use rate reflects Dwelling Units and PM Peak Hour.
Response : Confirm. Trip generation was estimated using the companion ITE web -based trip
generation tool.
3. Confirm the number of apartments proposed with the project and revise as needed in the
memo. The scoping memo states 195 while the impact study states 193.
Response : Confirmed, the site plan proposal includes 193 units in total.
Traffic Impact Study dated Februa!)� 28, 2018:
1 . Confirm the number of apartments proposed with the project and revise as needed in the
report. The impact study states 193, while the scoping memo states 195.
Response : Confirmed, the site plan proposal includes 193 units in total.
2. Page 6, 2nd paragraph - revise LOS standard on SR 99 from D to E.
Response : Correction made within the April 16, 2018 study update.
3. Update Table 4 to reflect any revisions made in addressing a and b in the scoping memo
above.
Response No corrections were required.
4. Revise Figure 4 as needed to reflect any edits form trip generation.
Response No corrections were required.
Transportation Planning I Design I Traffic Impact& Operations
PO Box 65254, Seattle, WA 98155 1 Office (206) 361-7333
JT Madison A p a rtments— 23326 Highw a y 99 (PLN20180012)
Response to City Comments on TraffiG Impact Study
5. Revise Table 5 to include AM peak hour. Traffic counts are higher in the AM with heavy
south bound movement on Highway 99. Address possible access issues and analyze LOS
of current and future 202 1 conditions.
Response: Traffic counts provided by the City from January 2018 during the AM peak period
were evaluated to determine the peak hours at study intersections along SIR 99 and traffic
operational impact analysis was included in Table 5. Counts, forecasts, and LOS summary
sheets are included as an additional attachment in the April 16, 2018, study update.
6. Traffic Impact Fees:
a) Confirm number of units
Response: Confirmed at 193 apartment units.
b) Note that if building permit is issued in 2019, the 2019 traffic impact fee rates Shall
apply.
Response: Comment noted.
VTENW April 19,2017
W I Page 2
Attachment A
LU Code 221 Description from
Trip Generation Manual, 1 Oth Ed itio n, ITE
Land Use: 221
Multifamily Housing (Mid -Rise)
Description
Mid -rise multifamily housing includes apartments, townhouses, and condominiums located within
the same building with at least three other dwelling units and that have between three and 10
levels (floors). Multifamily housing (low-rise) (Land Use 220), multifamily housing (high-rise) (Land
Use 222), off -campus student apartment (Land Use 225), and mid -rise residential with 1 st-floor
commercial (Land Use 231) are related land uses.
Additional Data
In prior editions of Trip Generation Manual, the mid -rise multifamily housing sites were further divided
into rental and condominium categories. An investigation of vehicle trip data found no clear differences
in trip making patterns between the rental and condominium sites within the ITE database. As more
data are compiled for future editions, this land use classification can be reinvestigated.
For the six sites for which both the number of residents and the number of occupied dwelling units
were available, there were an average of 2.46 residents per occupied dwelling unit.
For the five sites for which the numbers of both total dwelling units and occupied dwelling units were
available, an average of 95.7 percent of the total dwelling units were occupied.
Time -of -day distribution data for this land use are presented in Appendix A. For the eight general
urban/suburban sites with data, the overall highest vehicle volumes during the AM and PM on a
weekday were counted between 7:00 and 8:00 a.m. and 4:45 and 5:45 p.m., respectively.
For the four dense multi -use urban sites with 24-hour count data, the overall highest vehicle volumes
during the AM and PM on a weekday were counted between 7:15 and 8:15 a.m. and 4:15 and 5:15
p.m., respectively. For the three center city core sites with 24-hour count data, the overall highest
vehicle volumes during the AM and PM on a weekday were counted between 6:45 and 7:45 a.m.
and 5:00 and 6:00 p.m., respectively.
For the six sites for which data were provided for both occupied dwelling units and residents, there
was an average of 2.46 residents per occupied dwelling unit.
For the five sites for which data were provided for both occupied dwelling units and total dwelling
units, an average of 95.7 percent of the units were occupied.
The average numbers of person trips per vehicle trip at the five center city core sites at which both
person trip and vehicle trip data were collected were as follows:
* 1.84 during Weekday, Peak Hour of Adjacent Street Traffic, one hour between 7 and 9 a.m.
* 1.94 during Weekday, AM Peak Hour of Generator
* 2.07 during Weekday, Peak Hour of Adjacent Street Traffic, one hour between 4 and 6 p.m.
* 2.59 during Weekday, PM Peak Hour of Generator
iteM7, Trip Generation Manual 10th Edition - Volume 2: Data - Residential (Land Uses 200-299) 71
The average numbers of person trips per vehicle trip at the 32 dense multi -use urban sites at which
both person trip and vehicle trip data were collected were as follows:
* 1.90 during Weekday, Peak Hour of Adjacent Street Traffic, one hour between 7 and 9 a.m.
* 1.90 during Weekday, AM Peak Hour of Generator
* 2.00 during Weekday, Peak Hour of Adjacent Street Traffic, one hour between 4 and 6 p.m.
* 2.08 during Weekday, PM Peak Hour of Generator
The average numbers of person trips per vehicle trip at the 13 general urban/suburban sites at which
both person trip and vehicle trip data were collected were as follows:
* 1.56 during Weekday, Peak Hour of Adjacent Street Traffic, one hour between 7 and 9 a.m.
* 1.88 during Weekday, AM Peak Hour of Generator
* 1.70 during Weekday, Peak Hour of Adjacent Street Traffic, one hour between 4 and 6 p.m.
* 2.07 during Weekday, PM Peak Hour of Generator
The sites were surveyed in the 1980s, the 1990s, the 2000s, and the 2010s in Alberta (CAN), British
Columbia (CAN), California, Delaware, District of Columbia, Florida, Georgia, Illinois, Maryland,
Massachusetts, Minnesota, New Hampshire, New Jersey, Ontario, Oregon, Pennsylvania, South
Carolina, South Dakota, Tennessee, Utah, Virginia, and Wisconsin.
Source Numbers
168,188,204,305,306,321,357,390,436,525,530,579,638,818,857,866,901,904,910,912,
918,934,936,939,944,947,948,949,959,963,964,966,967,969,970
72 Trip Generation Manual 10th Edition - Volume 2: Data - Residential (Land Uses 200-299) KF�