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APPENDIX F Traffic Forecasts for State Highways
This appendix is included in your selections.

Appendix F presents 2035 traffic forecasts (20-year forecasts) for state highways in Snohomish County based on the county’s adopted land use plan. The methodology used in this TE to analyze state highway capacity and estimate traffic impacts to state-owned transportation facilities is similar to that used for county-owned arterial units: a planning-level, volume-to-capacity evaluation. This methodology is explained in Chapter II, Section B and Appendix E.

For the purposes of this TE, Snohomish County has identified 101 state route units for this planning-level analysis. For each unit, Appendix F presents for both existing conditions and the 2035 forecast year:

•a.m. and p.m. peak-hour traffic volumes,

•maximum service volume (MSV), and

•a.m. and p.m. peak-hour volume-to-capacity (V/C) ratios.

Traffic volumes are two-way volumes. Existing peak-hour volumes were estimated based on average daily volumes provided by WSDOT. The source of MSVs for the state route units was tailored to state highways. WSDOT does not have MSVs for state highways. Consequently, other sources were considered and, for the purposes of this TE, a set of tables developed by the Florida Department of Transportation based on the 2010 Highway Capacity Manual (ref. 12) were used to assign MSVs to the state route units. Like the analysis for county arterial units, if an improvement project that increases capacity on a state highway has been included in this TE (Appendix B), then the 2035 MSV reflects the increased capacity. The forecasted 2035 volumes are based on modeling results from the county’s TDF model. More detailed descriptions of the analysis of estimated traffic impacts to state-owned transportation facilities and the county’s TDF model can be found in the Draft Environmental Impact Statement (ref. 26) and Final Environmental Impact Statement (ref. 34) prepared for the 2015 Update of the GMACP.

STATE ROUTE UNITS

Existing

2035

State Highway

Unit #

Begin

End

AM Peak Traffic Volume

PM Peak Traffic Volume

Maximum Service Volume

AM V/C Ratio

PM V/C Ratio

AM Traffic Volume Forecast

PM Traffic Volume Forecast

Maximum Service Volume

AM V/C Ratio

PM V/C Ratio

US 2

201

I-5

SR 204

5,840

7,300

6,450

0.91

1.13

7,485

8,615

7,710

0.97

1.12

US 2

202

SR 204

Old SR 2 (Bickford Ave)

2,480

3,100

6,200

0.40

0.50

3,190

3,720

6,200

0.51

0.60

US 2

203

Old SR 2 (Bickford Ave)

SR 9

2,000

2,500

6,200

0.32

0.40

2,730

3,150

6,200

0.44

0.51

US 2

204

SR 9

92nd St SE

1,600

2,000

6,200

0.26

0.32

1,800

2,125

6,200

0.29

0.34

US 2

205

92nd St SE

SR 522

1,936

2,420

2,400

0.81

1.01

1,465

2,160

2,400

0.61

0.90

US 2 - New section

206

SR 522

City Limit Monroe (E)

1,415

1,940

5,660

0.25

0.34

US 2

207

SR 522

Old Owen Rd

2,560

3,200

3,040

0.84

1.05

2,140

2,505

3,040

0.70

0.82

US 2

208

Old Owen Rd

City Limit Monroe (E)

1,600

2,000

2,190

0.73

0.91

1,000

1,040

2,190

0.46

0.47

US 2

209

City Limit Monroe (E)

City Limit Sultan (E)

1,440

1,800

1,628

0.88

1.11

1,820

2,215

1,628

1.12

1.36

US 2

210

City Limit Sultan (E)

County Line

880

1,100

2,190

0.40

0.50

1,065

1,345

2,190

0.49

0.61

I-5

501

County Line (SR 104)

220th St SW

10,620

14,160

14,060

0.76

1.01

12,015

16,020

14,060

0.85

1.14

I-5

502

220th St SW

SR-524

10,800

14,400

14,060

0.77

1.02

13,065

16,035

15,060

0.87

1.06

I-5

503

SR-524

I-405

8,880

11,840

19,482

0.46

0.61

11,055

13,205

19,482

0.57

0.68

I-5

504

I-405

164th St SW

11,520

15,360

16,840

0.68

0.91

13,915

16,510

16,840

0.83

0.98

I-5

505

164th St SW

SR 96 (128th St SE)

10,800

14,400

14,060

0.77

1.02

12,375

16,500

14,060

0.88

1.17

I-5

506

SR 96 (128th St SE)

SR 526

10,020

13,360

13,390

0.75

1.00

12,020

16,030

13,390

0.90

1.20

I-5

507

SR 526

41st St

11,100

14,800

17,682

0.63

0.84

13,600

16,490

17,682

0.77

0.93

I-5

508

41st St

US 2

10,380

13,840

17,682

0.59

0.78

12,315

15,230

17,682

0.70

0.86

I-5

509

US 2

SR 528

8,520

11,360

11,060

0.77

1.03

10,040

12,255

11,060

0.91

1.11

I-5

510

SR 528

88th St NE

7,740

10,320

13,390

0.58

0.77

9,370

10,915

13,390

0.70

0.82

I-5

511

88th St NE

116th St NE

7,020

9,360

10,060

0.70

0.93

9,155

10,700

10,060

0.91

1.06

I-5

512

116th St NE

SR 531

6,240

8,320

10,060

0.62

0.83

7,085

9,445

10,060

0.70

0.94

I-5

513

SR 531

SR 530

5,100

6,800

10,060

0.51

0.68

6,075

7,730

10,060

0.60

0.77

I-5

514

SR 530

SR 532

4,560

6,080

8,370

0.54

0.73

5,900

7,195

8,370

0.70

0.86

I-5

515

SR 532

County Line

3,540

4,720

8,370

0.42

0.56

4,340

5,580

8,370

0.52

0.67

9

901

SR 522

SR 524

2,240

2,800

3,580

0.63

0.78

3,565

4,025

3,580

1.00

1.12

9

902

SR 524

180th St SE

1,200

1,500

1,064

1.13

1.41

2,705

3,145

2,774

0.98

1.13

9

903

180th St SE

SR 96 (E Lowell-Larimer Rd)

1,360

1,700

1,864

0.73

0.91

2,975

3,395

3,040

0.98

1.12

9

904

SR 96 (E Lowell-Larimer Rd)

US 2

1,560

1,950

1,460

1.07

1.34

2,805

3,280

3,200

0.88

1.03

9

905

US 2

Hewitt Ave/20th St SE

1,680

2,100

1,460

1.15

1.44

2,740

3,365

3,200

0.86

1.05

9

906

Hewitt Ave/20th St SE

SR 204

1,440

1,800

1,460

0.99

1.23

2,650

3,025

3,200

0.83

0.95

9

907

SR 204

Lundeen Park Way

2,640

3,300

3,040

0.87

1.09

3,740

4,445

4,579

0.82

0.97

9

908

Lundeen Park Way

SR 92

2,000

2,500

3,040

0.66

0.82

2,540

3,040

3,040

0.84

1.00

9

909

SR 92

SR 528

1,360

1,700

1,460

0.93

1.16

1,735

1,955

1,460

1.19

1.34

9

910

SR 528

SR 531

1,200

1,500

1,168

1.03

1.28

1,405

1,655

1,168

1.20

1.42

9

911

SR 531

SR 530

800

1,000

1,168

0.68

0.86

1,050

1,345

1,168

0.90

1.15

9

912

SR 530

County Line

624

780

1,300

0.48

0.60

730

995

1,300

0.56

0.77

92

9201

SR 9

N Machias Rd

1,200

1,500

1,460

0.82

1.03

1,610

1,680

1,460

1.10

1.15

92

9202

N Machias Rd

End of SR 92/Granite Ave

1,096

1,370

1,460

0.75

0.94

1,515

1,670

1,460

1.04

1.14

96

9601

I-5

SR 527

2,640

3,300

3,401

0.78

0.97

2,835

3,545

3,401

0.83

1.04

96

9602

SR 527

Seattle Hill Rd

2,320

2,900

3,401

0.68

0.85

2,925

3,680

3,401

0.86

1.08

96

9603

132nd St SE

E Lowell-Larimer Rd

880

1,100

1,410

0.62

0.78

1,360

1,660

1,410

0.96

1.18

96

9604

Seattle Hill Rd

SR 9

880

1,100

1,280

0.69

0.86

1,720

2,115

1,280

1.34

1.65

99

9901

County Line

SR 524

2,400

3,000

5,121

0.47

0.59

2,640

3,145

5,121

0.52

0.61

99

9902

SR 524

SR 525

2,640

3,300

5,121

0.52

0.64

3,060

3,560

5,121

0.60

0.70

99

9903

SR 525

Evergreen Way/SW Everett Mall Way

2,800

3,500

3,401

0.82

1.03

3,185

3,980

5,121

0.62

0.78

99

9904

Evergreen Way/SW Everett Mall Way

SR 526/I-5

2,640

3,300

5,121

0.52

0.64

2,975

3,720

5,121

0.58

0.73

99

9905

N 185th St

County Line

2,738

3,422

5,121

0.53

0.67

3,340

4,230

5,121

0.65

0.83

99

9906

N 175th St

N 185th St

2,981

3,726

5,121

0.58

0.73

3,475

3,985

5,121

0.68

0.78

104

10401

Edmonds Ferry Terminal

SR 104/5th Ave Merge

880

1,100

1,600

0.55

0.69

1,050

1,245

1,600

0.66

0.78

104

10402

SR 104/5th Ave Merge

SR 99

1,600

2,000

3,401

0.47

0.59

1,770

2,255

3,401

0.52

0.66

104

10403

SR 99

I-5

3,256

4,070

3,401

0.96

1.20

3,495

4,285

3,401

1.03

1.26

203

20301

County Line

US 2

1,000

1,250

960

1.04

1.30

1,210

1,440

960

1.26

1.50

204

20401

US 2

SR 9

2,400

3,000

2,990

0.80

1.00

2,810

3,200

2,990

0.94

1.07

I-405

40501

County Line

SR 527

7,440

9,920

12,363

0.60

0.80

10,405

11,290

19,482

0.53

0.58

I-405

40502

SR 527

I-5/SR 525

6,960

9,280

10,563

0.66

0.88

8,415

11,220

10,563

0.80

1.06

522

52201

County Line

SR 9

3,760

4,700

5,900

0.64

0.80

4,595

5,495

5,900

0.78

0.93

522

52202

SR 9

SR 524/Paradise Lake Rd

2,480

3,100

5,605

0.44

0.55

3,545

4,385

5,605

0.63

0.78

522

52203

SR 524/Paradise Lake Rd

164th St SE

2,160

2,700

2,190

0.99

1.23

3,810

5,065

5,660

0.67

0.89

522

52204

164th St SE

US 2

1,280

1,600

2,190

0.58

0.73

2,380

3,280

5,660

0.42

0.58

524

52401

SR 104

76th Ave W

1,040

1,300

1,410

0.74

0.92

1,295

1,560

1,410

0.92

1.11

524

52402

76th Ave W

SR 99

1,720

2,150

3,401

0.51

0.63

2,220

2,710

3,401

0.65

0.80

524

52403

SR 99

I-5

2,616

3,270

3,401

0.77

0.96

3,385

4,315

3,401

1.00

1.27

524

52404

I-5

24th Ave W

2,160

2,700

3,401

0.64

0.79

3,200

4,225

3,401

0.94

1.24

524

52405

24th Ave W

SR 527

1,384

1,730

1,520

0.91

1.14

2,365

2,965

3,401

0.70

0.87

524

52406

SR 527

SR 9

1,200

1,500

1,280

0.94

1.17

1,680

1,825

1,280

1.31

1.43

524

52407

SR 9

SR 522

528

660

1,280

0.41

0.52

1,075

1,105

1,280

0.84

0.86

524 Spur-Cedrwy

52408

SR 524 Mainline

I-5

2,160

2,700

3,759

0.57

0.72

2,345

2,935

3,759

0.62

0.78

524 Spur-3rd Ave

52409

SR 524 Mainline

SR 104

272

340

1,064

0.26

0.32

460

460

1,064

0.43

0.43

525

52501

I-5/I-405

SR 99

4,216

5,270

6,700

0.63

0.79

5,130

6,415

6,700

0.77

0.96

525

52502

SR 99

SR 525 Spur-Paine Field Blvd

3,184

3,980

3,759

0.85

1.06

3,600

4,360

3,759

0.96

1.16

525

52503

SR 525 Spur-Paine Field Blvd

Mukilteo Ferry Terminal

1,216

1,520

1,680

0.72

0.90

1,325

1,615

1,680

0.79

0.96

525 Spur-Paine

52504

SR 525 Mainline

SR 526

1,680

2,100

3,580

0.47

0.59

2,595

2,310

3,580

0.72

0.65

526

52601

SR 525 Mainline

Airport Rd

2,616

3,270

5,605

0.47

0.58

3,085

3,560

5,605

0.55

0.64

526

52602

Airport Rd

Evergreen Way

4,104

5,130

8,398

0.49

0.61

4,605

5,755

8,398

0.55

0.69

526

52603

Evergreen Way

I-5

5,920

7,400

8,398

0.70

0.88

6,285

7,860

8,398

0.75

0.94

527

52701

I-405

SR 524

3,624

4,530

4,261

0.85

1.06

4,910

5,285

4,261

1.15

1.24

527

52702

SR 524

180th St SE

2,760

3,450

3,401

0.81

1.01

3,730

3,955

3,401

1.10

1.16

527

52703

180th St SE

164th St SE

2,400

3,000

3,401

0.71

0.88

3,335

3,550

3,401

0.98

1.04

527

52704

164th St SE

SR 96

1,760

2,200

3,401

0.52

0.65

2,585

2,685

3,401

0.76

0.79

527

52705

SR 96

112th St SE

1,560

1,950

3,401

0.46

0.57

2,400

2,385

3,401

0.71

0.70

527

52706

112th St SE

I-5

2,104

2,630

3,401

0.62

0.77

3,015

3,095

3,401

0.89

0.91

528

52801

I-5

SR 529

2,520

3,150

2,708

0.93

1.16

2,700

3,380

2,708

1.00

1.25

528

52802

SR 529

SR 9

1,440

1,800

2,708

0.53

0.66

1,465

1,830

2,708

0.54

0.68

529

52901

Pacific Ave

Everett Ave

1,040

1,300

2,774

0.37

0.47

1,460

1,955

2,774

0.53

0.70

529

52902

Maple St

W Marine View Dr

1,256

1,570

2,774

0.45

0.57

1,395

1,800

2,774

0.50

0.65

529

52903

Everett Ave

Broadway Ave

1,040

1,300

3,401

0.31

0.38

1,855

1,635

3,401

0.55

0.48

529

52904

Broadway Ave

I-5

2,440

3,050

4,695

0.52

0.65

3,695

3,465

4,695

0.79

0.74

529

52905

I-5

SR 528

1,064

1,330

2,990

0.36

0.44

2,730

2,525

2,990

0.91

0.84

529 Spur-Everet

52906

Maple St

I-5

608

760

2,774

0.22

0.27

1,195

1,345

2,774

0.43

0.48

530

53001

I-5

SR 9

1,328

1,660

1,550

0.86

1.07

1,720

1,885

1,550

1.11

1.22

530

53002

SR 9

Arlington Heights Rd

824

1,030

1,300

0.63

0.79

1,135

1,370

1,300

0.87

1.05

530

53003

Arlington Heights Rd

County Line

336

420

1,550

0.22

0.27

785

835

1,550

0.51

0.54

531

53101

Wenberg County Park

Lakewood Rd

164

205

2,190

0.07

0.09

220

270

2,190

0.10

0.12

531

53102

E Lake Goodwin Rd

Forty Five Rd

720

900

2,190

0.33

0.41

815

1,015

2,190

0.37

0.46

531

53103

Forty Five Rd

I-5

816

1,020

960

0.85

1.06

960

1,225

960

1.00

1.28

531

53104

I-5

Smokey Point Blvd

2,576

3,220

3,838

0.67

0.84

2,730

3,435

3,838

0.71

0.89

531

53105

Smokey Point Blvd

67th Ave NE

1,624

2,030

1,460

1.11

1.39

1,825

2,365

3,040

0.60

0.78

531

53106

67th Ave NE

SR 9

784

980

1,460

0.54

0.67

1,175

1,765

3,040

0.39

0.58

532

53201

County Line

64th Ave NW

1,440

1,800

1,460

0.99

1.23

1,575

2,080

1,460

1.08

1.42

532

53202

64th Ave NW

I-5

1,360

1,700

2,190

0.62

0.78

1,535

2,075

2,190

0.70

0.95