JOHNSON ROAD IMPROVEMENTS

COUNCIL WORK SESSION

AUGUST 22, 2019

Jonathan Bengfort, PE

Caleb Milligan, PE

JOHNSON RD

JOHNSON RD

LATIGO LN

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Project Overview

JOHNSON RD

JOHNSON RD

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Project Overview

2019 2020 2021 2022 2023

* General Project Location Only

Estimated Combined Project Timeline

Project Goals Intersection Operation

Utility Coordination

Vehicular Safety

Pedestrian Safety

DrainageJOHNSON RD

JOHNSON RD

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Considerations Right of Way

Trees

Master Plans

Construction Fatigue

Budget

Project Options Intersection Operation

– Traffic Signal

– Roundabout

Roadway

– Reconstruct Existing

– 2 Lane (wider)

– 3 Lane

Drainage

– Open Bar Ditch

– Enclosed Storm Drainage

Sidewalks

– One Side/Both Sides

– 5’ or 10’ Widths

JOHNSON RD

JOHNSON RD

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No Option Stands Alone…

– Roundabout

JOHNSON ROAD PROJECT CONSOLIDATION

Project Name BudgetFunding Sources

Funding Year

Johnson Road/Keller-Smithfield Roundabout

925,000General Fund, St

Maint, Road Impact Fee

FY 2018

Johnson Road Reconstruction

(Rufe Snow to Keller-Smithfield)2,000,000

General Fund, Road Impact

Fee

FY 2019

Johnson Road Reconstruction (Keller-Smithfield to Rhonda)

2,000,000 General Fund FY 2020

Johnson Rd 12" Water Lines 800,000 W/WW Debt FY 2020

Trail System Expansion 216,000Keller

Development Corporation

FY 2020

$5,941,000

EXISTING CONDITIONS

Existing Conditions Rural two-lane HMAC

roadway with bar ditches

Substandard Pavement Condition

Insufficient Bar Ditch Capacity

Few Streetlights

6” AC water line

No Sidewalks

Residential Area

• Large Acreage Lots

• Age Mix

INTERSECTIONCONSIDERATIONS

Roundabout Selection■ Intersection Control

Evaluation was performed

– All Way Stop (LOS F)

– Signalized (LOS D)

– Mini Roundabout (LOS C)

– Single-Lane Roundabout (LOS A)

■ Single-Lane Roundabout

– Optimal Solution

– Safety benefits

– Fits within R.O.W.

– Enhancement opportunity

UTILITIES

Franchise Relocates

■ Several private utilities to be adjusted (by franchise utilities)

Water

■ ~2,025 LF 12” PVC water line

■ ~2,100 LF 8” PVC water line

Illumination

■ Approx. 10 new LED streetlights

• Oncor-owned

Utility Improvements

DRAINAGE

Bar Ditch Drainage System

Existing Drainage Conditions

■ Ditches vary in width and depth

■ Insufficient capacity throughout

■ Approx. 5 roadway culverts

■ Approx. 17 driveway culverts

• Several driveways without

■ Three areas of drainage concern

Non-Curbed with Bar Ditches

Proposed Drainage Alternatives

■ Pros

• Maintains existing rural feel

• Potentially lower project cost

• Potentially shorter construction time

■ Cons

• Less storm water capacity

• Requires more R.O.W.

• More tree removal required

• Pavement edge instability

Curbed Roadway

Proposed Drainage Alternatives

■ Pros

• Higher storm water capacity

• Less R.O.W. required

• Less tree removal required

• Extended roadway life

■ Cons

• Potentially longer construction time

• Potentially higher project cost

• Modifies existing aesthetics

JOHNSON RD

JOHNSON RD

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Drainage Concern Areas

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Drainage Concern #1

Issue:

■ Insufficient storm water conveyance through1228 Johnson Rd & 425 Huffman Bluff

Options:

1. Detention pond north of Johnson Road

2. Detention pond within 1228 Johnson Rd property

3. Underground system to outfall near Rhonda Rd

Option #1Option #2Option #3

Alternative#2

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Drainage Concern #2

Issue:

■ Nuisance flooding north of existing Newton Ranch detention pond

Options:

1. Swale Improvements

2. Storm Drain System

Alternative#1

Drainage Concern #3

Issue:

■ Storm water runoff from 1342 Johnson Rd is directed to 1358 Johnson Rd

■ Private lot-to-lot drainage issue

Recommendation:

■ Provide storm drain stub-out for private system connection

■ Others?

JOHNSON RD

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1342

JOHNSON RD

1358

JOHNSON RD

ROADWAY

Roadway

Initial Analysis

■ Identified as C4U on Plan

• 4-Lane undivided

• Identifies 74-80ft of R.O.W.

• Unnecessary based on current and projected traffic

■ Option to reconstruct existing

■ Evaluated two alternatives

• 2-Lane, 31-ft (Local)

• 3-Lane, 41-ft (C3U)

■ 2- or 3-Lane options acceptable based on traffic volumes

Major Thoroughfare PlanClassification Table

2-Lane (Local)

Alternative Roadway Sections

(2) 15’ Lanes

60’ ROW

$3.4M

■ Pros

• Fewer ROW acquisitions (~9)

• Lower project cost

• Fewer grading impacts

• Fewer impacted trees

■ Cons

• Less drainage capacity

• Lower vehicular safety

• Doesn’t meet the context of collector

3-Lane (C3U)Modified

Alternative Roadway Sections

(2)11’ Lanes w/14’ Center Turn Lane

65’ ROW

$4.1M

■ Pros

• Improved drainage capacity

• Greater vehicular safety

• Better Drainage Control

■ Cons

• More ROW acquisitions (~20)

• Higher project cost

• More impacted trees

• More grading impacts

Right-of-way Comparison2-Lane, 60-ft R.O.W.

9 Properties Impacted

Right-of-way Comparison3-Lane, 65-ft R.O.W.

20 Properties Impacted

Pedestrian Mobility Options

JOHNSON RD

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■ 5-foot sidewalks

– Both sides

– One side. Which?

■ Trail Connection

– 8-foot minimum, 10-foot standard

Considerations:

Trail Master Plan includes trail on south side of Johnson

Pedestrian options on both sides of a street improve capacity and safety

Project Goals

JOHNSON RD

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Considerations

Intersection Operation

Utility Coordination

Vehicular Safety

Pedestrian Safety

Drainage

Right of Way

Trees

Master Plans

Construction Fatigue

Budget

Next Steps

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JOHNSON RD

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Tonight: Q&A, Review & Discussion in Foyer, Comment Cards, Sticker Votes

Until Sept. 13: Presentation & tonight’s video on city website with online feedback forms

Work session with City Council & 2nd Public Input Meeting once a “final” plan has been established based upon feedback

Final adjustments based on second round of input

City Council direction to proceed

QUESTIONS