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Item 4 - Study Level of Service for TransportationCIT Federal Wa Transportation Level of Service Standard Presented by Rick Perez, P.E. City Traffic Engineer Chris Breiland, P.E. Fehr & Peers 6/29/2021 CIT Federal Wa LOS Defined • Letter grades A - F • A best, F worst • Measured differently for different facilities LOS Signalized Intersections (Seconds delay per vehicle) Unsignalized Intersections (Seconds delay per vehicle) Volume/Capacity Ratio A <10 <10 <0.60 B >10-20 >10-15 >0.60-0.70 C >20-35 > 15-25 >0.70-0.80 D >35-55 >25-35 >0.800.90 E >55-80 >35-50 >0.90-1.00 F > 80 > 50 > 1.00 6/29/2021 CIT Federal Wa Why Have a LOS Standard? • Required under GMA • GMA also requires concurrency for transportation • Plan for growth • Project prioritization • Determine need for mitigation for development 6/29/2021 3 CIT Federal Wa Federal Way's History of LOS • 1995 Comprehensive Plan •v/c<0.90 • 1998 Comprehensive Plan •v/c< 1.00 • LOS E at signalized intersections using 120- second cycle length • LOS based on person -delay if HOV lanes exist 6/29/2021 C! CIT Federal Wa How LOS Is Measured • City travel demand model forecasts future traffic volumes • Traffic analysis software uses travel model data to calculate LOS 6/29/2021 5 CIT Federal Wa Travel Demand Forecasting • Existing major street network modeled • Existing land uses programmed into model • Model calibrated to match existing conditions • Future land use forecasts (2040) developed • Federal Way increases by 25,000 population and 20,000 jobs • Region increases by 1.5 million population and 1 million jobs • Model outputs future traffic volumes 6/29/2021 0 CIT Federal Wa Regional Assumptions in the 2040 Model • Transit service doubled from existing conditions • Light rail completed between Seattle and Tacoma • Large percentage of growth contained in designated centers • Major highway projects completed • SR 509 extension • SR 167 extension • I-5 HOT lanes • Triangle project completion • New I-5 City Center Access • All existing TIP projects completed 6/29/2021 7 CIT Federal Wa Despite All That: • Vast majority of trips will still be using cars • Failure to meet travel demand on freeways will spill over onto City streets • Traffic conditions in Federal Way when a major incident occurs on I-5 now will become an everyday occurrence. 6/29/2021 0 CIT Federal Wa Intersections failing existing LOS standard by 2040 6/29/2021 How Bad? 0 0.5 1 N ®Mlle s 27211d ke h o �o 5288th St Y1p N Qa,�tRd , o�yr 304th. St i ••5312th St s W o asn SW 320th SE 4Y. St 3241h 3 tit a' 324ih 51 � Nort s h hors Pl �W C3mq` # 336th St rS 4Hth St z z �W356th St f . T 3 � A 47d%P H �}'9'� e%4Q • 5 ac ?a e< 9 CIT Federal Wa Should We Keep Up? • City incorporation and GMA passage occurred in part over frustration with inadequate transportation investment to accommodate growth. • City surveys over previous budget cycles identified transportation as a top priority. • Regional surveys identify transportation as most critical regional problem. 6/29/2021 10 CIT Federal Wa Existing Comprehensive Plan and GMA Guidance for Reconciling LOS Needs with Available Funding Options: • Increase level of funding • Revise land use assumptions to lower travel demand • Revise capital project prioritization to fund capacity needs • Lower LOS standard to meet available funding 6/29/2021 11 CIT Federal Wa Existing Comprehensive Plan and GMA Guidance for Reconciling LOS Needs with Available Funding Revise land use assumptions to lower travel demand • Inconsistent with urban center goals and policies • Limits economic development • City can't control external traffic 6/29/2021 12 CIT 'k N411110w. Federal Wa Existing Comprehensive Plan and GMA Guidance for Reconciling LOS Needs with Available Funding Revise capital project prioritization to fund capacity needs • Reduces funding for safety improvements • Reduces funding for non -motorized transportation • Inconsistent with adopted goals and policies • Would still be inadequate level of funding to address needs 6/29/2021 13 CIT Federal Wa Existing Comprehensive Plan and GMA Guidance for Reconciling LOS Needs with Available Funding Revise LOS standard to meet available funding: • Adversely impact roadway safety • Adversely impact air quality • Adversely impact transit operations 6/29/2021 14 CIT Federal Wa Existing Comprehensive Plan and GMA Guidance for Reconciling LOS Needs with Available Funding "Therefore, improvement in funding for transportation capacity appears to be the most realistic alternative". Are there tradeoffs? 6/29/2021 15 CIT Federal Wa Extent of Improve- ments by 2040 to Maintain Existing LOS 6/29/2021 M de . SW 32G�f�5t� .i �W35Sth$t S 272nd $t s P7. a n F o * . � � s 288th $i — Al� 1 i 304th St - w. 312th St ^� .T� S 32Ath S1 t _ f - a5335Ih51 � :•� m a . PS 348th St .. 'Or y1 Qa 16 The Problem Future Growth Results in Additional Traffic • Maintaining the current LOS standard will not be possible without additional widening on large roads such as 320t" Street • Implications for: • Right-of-way impacts • Costs to provide additional capacity • Pedestrian environment • Signal timing • Urban form F-C We - 6 LOS Method AM Intersections — uniform standard Intersections — LOS exceptions allowed Area average intersection Corridor average intersection Corridor/screenline average segment Corridor travel times System implementation Tj Federal Way Issaquah Bellevue, Kirkland Bothell, Tukwila, Kent Tacoma, Seattle Snohomish County Redmond LOS Method AL j Intersections — uniform standard Intersections — LOS exceptions allowed Area average intersection Corridor average intersection Federal Way Issaquah Bellevue, Kirkland Bothell, Tukwila, Kent Corridor/screenline average segment Tacoma, Seattle Corridor travel times Snohomish County System implementation Redmond City of Federal Wey nompreh -"`Plan 2020 Congestion with 2008 Street & Highway Improvements rtgsra•md •+ TraiMallon Elemerrt f.. �•� Federal Way City Urnits ♦. Potential Annexation Area " 0" Congested Streets _ .� - • Congested Intersections 1 ,.t 4 a 1 •♦ � � 21 a 0 1 Mlle t i -% Federal Way MAP III-12 w • Travel delay calculated at each intersection • Easy to calculate, well understood • Exceeding standard requires additional capacity/mitigation • Many cities "exempt" some intersections • Intersection LOS calculated and averaged over an area • Based on common methods, tolerates congestion at "built - out" intersections • Improvements anywhere in the "area" can improve LOS result eWy LEGEND Level of Service ■ n-B 1 ■ C ■ E-F Q Comdor • Studied Intersection . Corridor ID • Intersection LOS calculated and averaged over a corridor • Similar pros/cons to area LOS • Common in the region .»9[.[. 1.11 1.12 Transporation Figure 2 1.13 Level of Service 7.12 i (LOS) Screenlines } ' I V _13.11 6.12 b 6.11 I}.4 -13.12 - 6.14 6.15 5.12 5.13 � +a Level of Service Screenline 'S'. I e Arterial 8.12 10.11 9-11 IIIII mom..' r Ilkt �,I i F N�\ P 9.13 INL, 3..12 4.11 20114 Ciq aE S.W. 4.12 4.13 4 NO wnMka Nerry wrt. "+dus"6 waracY. I! - �V� fib�ar mertfunbbih, ry tld� �o orod�. gment Pertc • Roadway volume/capacity ratios calculated • Easy to calculate • Does not identify project -level mitigation measures well • WC standards set such that "exemptions" are allowed CIT Federal Wa The Mayor's Proposal • Modify the LOS standard for signalized intersections only: • Within City Center, average v/c < 1.10 • Outside of City Center, each intersection v/c < 1.20. • Unsignalized intersections unchanged at v/c <1.00 6/29/2021 25 CIT Federal Wa Existing 0 05 1 s, „s� ®Mile 1r. SWo01 t Pi.wy Proposed 6/29/2021 26 CIT Federal Wa Next Steps • Draft Comprehensive Plan Transportation Element to Planning Commission early May • To LUTC June 1 • To Council June 16 • Goal is to meet legislative mandate of adoption by July 1 to maintain transportation grant funding eligibility 6/29/2021 27