Study Purpose Update the Arterial Grid Analysis Phase I study - - PowerPoint PPT Presentation

Study Purpose

• Update the Arterial Grid Analysis – Phase I study results

(2006)

• Evaluate the operation of arterial grid roadway system in

Miami-Dade County

– Develop a consolidated database of traffic counts and estimate level of service – Develop roadway characteristics maps – Identify ways to improve capacity and efficiency of roadway network

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Grid Road System - Benefits

• Choice
• Redundancy
• Safety
• Economic activity
• Smart growth
• Healthy communities

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Key Findings

• A decreasing trend of traffic

volume between 2004/05 and 2011/12

• Traffic volume decreased in 68%
• f roadway segments evaluated
• Net change of Average Daily

Traffic at 1040 roadway segments is (-)1.94 million vehicles

• Consistent with national

trends

Gr e e n – volume de c r e ase d Re d – volume inc r e ase d

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Key Findings

• Level of service deficiencies
• 35% of arterial segments and 7% of collector segments operate at

LOS F

• Fewer deficient corridors compared to 2004/05
• Connectivity improvements to collector roadways may help

relieve adjacent failing arterials

LOS F Roadway Segments b s by F Functional C Classi ssification

F unc tional Class % L OS F Se gme nts (2004/ 05 data) % L OS F Se gme nts (2011/ 12 data)

Co lle c to rs 17% 7% Arte ria ls 42% 35%

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Key Findings

• Level of service deficiencies
• A higher proportion of deficient corridors are located

south of Flagler Street

North/ South County Distribution

C or be tte r D E F T

• tal

No rth o f F la g le r St 52% 24% 6% 18% 100% So uth o f F la g le r St 44% 26% 6% 24% 100% T

• ta l

48% 25% 6% 21% 100%

LOS Summary b by % % C Centerline e Miles es

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• Improvements within

Priority Corridors (Type 1 projects)

– Roadway widening – Arterial grade separation – Interchanges at expressways – Intersection improvements

• Grid Network Connectivity

(Type 2 projects)

– At expressways – At canals – Other locations

Improve

• vement St

Strategie ies

Se e Handout

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Priority Corridor (Type 1) Projects

Road F r

• m

T

• Impr
• ve me nt

Cate gor y

SW 42 Stre e t HE F T SW 137 Ave nue Wide n to 6 la ne s Wide ning SW 152 Stre e t SW 117 Ave nue US 1 Wide n to 6 la ne s Wide ning SW 8 Stre e t SW 107 Ave nue Gra de se pa ra te E

• W

thro ug h la ne s Arte ria l g ra de se pa ra tio n SW 8 Stre e t SW 137 Ave nue Gra de se pa ra te E

• W

thro ug h la ne s Arte ria l g ra de se pa ra tio n NW 36 Stre e t NW 72 Ave nue Gra de se pa ra te E

• W

thro ug h la ne s Arte ria l g ra de se pa ra tio n SW 56 Stre e t

• r SW 72

Stre e t Ho me ste a d E xte nsio n o f F lo rida ’ s T urnpike Pa rtia l inte rc ha ng e I nte rc ha ng e s SW 72 Stre e t SR 874 (Do n Shula E xpre sswa y) Pa rtia l inte rc ha ng e I nte rc ha ng e s SW 72 Stre e t SW 107 Ave nue I ndire c t le ft turns I nte rse c tio n impro ve me nts SW 117 Ave nue SW 128 Stre e t, SW 134 Stre e t, a nd SW 136 Stre e t Co ntinuo us flo w (turb o ) la ne s – so uthb o und SW 117 Ave nue I nte rse c tio n impro ve me nts

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Priority Corridor (Type 1) Projects Benefits of Recommendations

Wide deni ning ng

• Would add 4.5 centerline miles (9 lane miles).
• Capacity of each widened segment would increase by 20,000 vehicles per day (at

LOS D). Arter erial G Grade S de Sepa paration

• Would benefit approximately 315,000 vehicles per day through reduced conflicts

and delay. (315,000 is the total ADT at the above three intersections). Int ntercha hang nges

• Potential redistribution of traffic from SW 40 Street and SW 88 Street between SR

826 and HEFT.

• Relieve interchanges at HEFT and SW 40 Street, HEFT and SW 88 Street, SR 874 and

SW 88 Street, and SW 72 Street and SR 826. Inter ersec section I n Impr provem emen ents

• Reduction of overall peak period delay

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Example – Type 1 Project Partial Interchange - SW 72 Street and SR 874

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Arterial Grid Network (Type 2) Projects

Road F r

• m

T

• Impr
• ve me nt

Cate gor y

SW 77 Ave nue SW 159 T e rra c e SW 160 T e rra c e Bridg e o ve r C-100A fe e de r c a na l Missing link a t c a na l SW 77 Ave nue SW 173 Stre e t SW 174 Stre e t Bridg e o ve r C-100 c a na l Missing link a t c a na l SW 87 Ave nue SW 163 T e rra c e SW 164 Stre e t Bridg e o ve r C-100 c a na l Missing link a t c a na l SW 102 Ave nue SW 145 Stre e t SW 146 Stre e t Bridg e o ve r C-100 c a na l Missing link a t c a na l SW 122 Ave nue SW 210 Stre e t SW 212 Stre e t Bridg e o ve r Bla c k Cre e k c a na l Missing link a t c a na l SW 120 Stre e t SW 99 Co urt SW 99 Ave nue Bridg e o ve r C-100C c a na l Missing link a t c a na l SW 136 Stre e t Ha rriso n Stre e t SW 112 Ave nue Bridg e o ve r C-100 c a na l Missing link a t c a na l NE 215 Stre e t NE 14 Ave nue I

• 95

Co nstruc t 2 la ne fa c ility Othe r missing links SW 120 Stre e t SW 82 Ro a d US 1 Co nstruc t 2 la ne fa c ility Othe r missing links SW 127 Ave nue So uth o f SW 224 Stre e t W Dixie Hig hwa y Co nstruc t 2 la ne fa c ility Othe r missing links SW 16 Stre e t SR 826 (Pa lme tto E xpre sswa y) Co nne c t SW 16 Stre e t Missing link a t e xpre sswa y SW 120 Stre e t SR 874 (Do n Shula E xpre sswa y) Co nne c t SW 120 Stre e t Missing link a t e xpre sswa y

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Arterial Grid Network (Type 2) Projects Benefits of Recommendations

Missi sing L Link nks s at Cana nals

• Improve continuity of the section-line and half section-line street network in

South Miami-Dade County Missi sing L Link nks s at E Expr press essways

• SW 16 Street to serve as a secondary E-W street and relieve SW 8 Street
• Establish SW 120 Street as a continuous section-line road in south Miami-Dade

County by completing missing segments Other er M Missi sing L Link nks

• Improve continuity of County Line Road
• Improve continuity of section-line street network in South Miami-Dade County

Al All P Proje jects

• Provide opportunities for multimodal connections

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Example – Type 2 Project Missing Link - SW 120 Street at US 1

SW 120 Street 13

Next Steps

• Finalize the report
• Consider incorporating the recommended

improvements into the planning and prioritization processes

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