S24 Current Corridor Studies LTC2013

7/29/2019 S24 Current Corridor Studies LTC2013

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Corridor Studies

LA 415 and LA 73


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Project Approach for Both Corridors

1. Data Collection

2. Data Summary

3. Traffic Analysis

4. Micro-Simulation modeling

5. Generation of alternatives

6. Modeling alternatives

7. Recommended alternative


3/31

LA 415 Lobdell Avenue in West Baton Rouge Parish

LA 415

I-10

US 190


4/31

LA 415

North-south state highway between I-10 and US 190

Southern end classified as a urban arterial between I-10and Rosedale Road

5 lane section with a continuous two-way left turn lane (TWLTL)

Multiple commercial developments and driveways on both sides ofLA 415.

Northern end classified as suburban arterial between RosedaleRoad and US 190.

Four lane section with a depressed median (42-45 feet wide)

Numerous median openings

Mostly farmland along this section of LA 415


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LA 415

Major intersections along corridor I-10 ramps

Commercial Drive

Court Street

Rosedale Road

Lafiton Lane

Signalized intersections

Court Street

Rosedale Road

Provide connection between LA 415 and Port Allen


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LA 415

LA 415 and US 190 are used as alternative routes to getinto and/or out of Baton Rouge when there is an incidenton I-10 MRB

During an incident on the I-10 MRB, LA 415 and US 190

become heavily congested

Proposed LA 1 toll road connector to the south of I-10 maygreatly effect traffic volumes at the LA 415 / I-10interchange


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Data Collection LA 415

Seven day 24-hour classification counts (2 locations)

24-hour approach counts (4 locations)

Turning movement counts (4 locations)

Driveway Counts (35 locations)

Corridor Travel Times

Spot Speeds


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Travel Time Comparison LA 415

51

215

235

51

224

242

0

50

100

150

200

250

300

Between I-10 & Court Street Between Plantation Drive &Court Street

Between I-10 & Plantation Drive

TravelTime(se

c)

Corridor Sections

AM Peak Period Travel Times

Southbound

Northbound


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85th Percentile Speeds LA 415


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Speed Distribution LA 415

0%

5%

10%

15%

20%

25%

1-15 16-20 21-25 26-30 31-35 36-40 41-45 46-50 51-55 56-60 61-65 66-70 71-75 76-999

#Vehicles

Speed (mph)

Average weekday SB speed distribution - b/w Court St and I-10(Segment A)

AM Peak

Noon

PM Peak


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Crash Data LA 415

Crash reports for three previous years for two control

sections

Crash data acquired from DOTD database

Analyzed types and severity of crashes at intersections

and along the corridorLeft

Turn-e, 9 Left Turn-f,19

LeftTurn-g, 7

Non Coll,

22

Rear End,70

RightTurn-i, 1

RightTurn-h, 2

RightAngle,

40

SideSwipe,

21

Crashes by Reported Type

0%

5%

10%

15%

20%

25%

30%

35%

40%

LeftTurn-e

LeftTurn-f

LeftTurn-g

NonColl

RearEnd

RightTurn-i

RightTurn-h

RightAngle

SideSwipe

Control-Section 013-01 between logmile

0.000 and 3.298Reported Crash Type

State Avg-Rural 4-Ln Divided Control Section%


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LA 73 Jefferson Highway in East Baton Rouge Parish

LA 73

I-12

US 61

I-10


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LA 73

Jefferson Highway is a state highway that runs northwest-southeast located in center of Baton Rouge

Classified as a urban arterial:

5 lane section with a continuous two lane left turn lane (TWLTL)

through out the corridor. Turn lanes at most of the signalized intersections.

7 lane section at major signalized intersections.

Multiple commercial developments and driveways on both sides ofLA 73.


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LA 73

Major intersections with heavy volumes:

Corporate Boulevard / Old Hammond Highway

Essen Lane

Drusilla Lane

Bluebonnet Boulevard

3.5 mile section

10 signalized intersections

25+ unsignalized intersections

Over 100 driveways

Issues:

Heavy delays during peak hours

Safety issues with high density of driveways


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Data Collection LA 73

Seven day 24-hour classification counts (4 locations)

24-hour approach counts (10 locations)

Turning movement counts (10 locations)

Driveway Counts (150 locations)

Corridor Travel Times

Spot Speeds


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Travel Time Comparison LA 73


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85th Percentile Speeds LA 73


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Speed Distribution


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Crash Data LA 73

Crash reports for three previous years

Crash data from DOTD database

Analyzed types of crashes at intersections along studycorridor

0%

10%

20%

30%

40%

50%

60%

HeadOn

LeftTurn-e

LeftTurn-f

LeftTurn-g

NonColl

RearEnd

RightTurn-h

RightTurn-i

RTAngle

SSwipe(OD)

SSwipe(SD)

Control Section 077-05 from logmile 0 and 3.71- Reported Crash Type

State Avg Urban 4-Ln Divided Control Section%


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Alternative Pyramid

After Draft Technical Memo approval:

Begin alternative analysis 5 initial alternatives developed

Of the 5 alternatives 2 are eliminated and the remaining3 are modeled in Vissim for comparative benefits.

From comparative analysis 1 final alternative is chosen.

The final alternative is segmented into constructablesegments and preliminary engineering costs (ROW, utility

relocation, and construction costs) are estimated. LA 415 investigate potential alternative corridor for I-10 /

US 190 connection.


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Constructability

LA 415

biggest challenge not to disrupt the truck trafficwhich greatly effects the interstate ramps.

Additionally connection with US 190 with the at graderail crossing.

LA 73 maintenance of traffic during construction,especially at key locations at I-12, Essen Lane, and Old

Hammond Hwy / Corporate Boulevard


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LA 73 and LA 415 Goals

Safety

Improve safety and reduce number of accidents.

Mobility Make movement of traffic along the corridor moreefficient.

Accessibility Utilize access management techniques andstrategies to reduce the number of direct openings on to thestudy corridors.

Intelligent Design Use innovative techniques and designs tofor smooth traffic flow (Super-streets, J-turns, etc.,)

Future uses A design that would sustain future growth andtraffic needs.


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Difference in approach

Purpose for studying the corridors LA 415 a primary goal is to maintain the integrity of the corridor for

smooth traffic flow in case of emergency I-10 closure.

LA 73 goal is to improve safety and traffic flow.

Urban (LA 73) vs. Rural (LA 415)

Available ROW to make improvements

Not much available ROW for LA 73. Expensive to buy surroundingland.

Existing ROW available for LA 415.


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Difference in approach

Nearby networkArea around LA 73 is mostly built out with not many possibilities of

alternate routes or options for changing the alignment.

Less complicated for LA 415 to achieve the project goals.


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Modeling Tools

SYNCHRO HCM methodology

Easy to understand output for Traffic engineers to makeassessments

Quick


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Modeling Tools

VISSIM micro simulation: Stochastic

Time step model

Pseudo-physical car following algorithm

Ability to simulate and analyze unconventional designs

Wide variety of MOEs


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Public/Local Official Involvement

During the course of the alternative design

visits to localofficials are planned to involve leadership in the designprocess

Alternative workshops will take place to review the

alternatives and solicit input to the alternatives to form astrong work relationship with local agencies and officials


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Final Deliverables Vissim model (LA 415)


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Vissim Model - LA 73


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Final Deliverables

VISSIM model of the final design

Final design alternate with associated construction andROW costs

Constructible build segments Final report which explains design methodology used,

alternative choice matrices, and final alternativepreliminary layout


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QUESTIONS ?

Contact Information

Karl F. Rothermel, P.E., [email protected]

(225) 751-3012
mailto:[email protected]:[email protected]

S24 Current Corridor Studies LTC2013

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