Item 10ATOWNSCAPE, Inc. with Kimley-Horn Associates, Inc.
Southlake
URBAN DESIGN STUDY
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
Agenda:
Introduction
What is Access Management
Impacts of Access Management
Design Aspects of Medians
Median Locations
Design Treatments
Next Steps
Discussion and Public Input
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
Introduction
2025 Plan recommendations on:
Median plan
Urban design study
How median plan fits into urban design study
Texas Department of Transportation funding
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
What is Access Management?
Driveway and public street connections
Medians and median openings
Traffic signals
Interchanges
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
Benefits of Access Management
Safety (turning movements, pedestrian crossing, public safety – police and fire)
Efficiency of roadway (connectivity, congestion, travel time, LOS)
Business impact perception (short term and long term)
Aesthetics (building lasting value)
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
Public Safety and Medians
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
Good Cross Access in Southlake
Kimball
Southlake Blvd.
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
Source: NCHRP Report 420: Impacts of Access Management Techniques
More about Safety
As access density increases, crash rates increase:
0
1
2
3
4
5
10
20
30
40
50
60
Access Points per Mile
Crash Rate Index
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
Scientific Research on Medians
Medians are 25% Safer
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
Recent Case Study in Houston
0
500
1000
1500
2000
Pearland
(TWLTL)
Friendswood
(Raised Median)
League City
(TWLTL)
Kemah
(TWLTL)
Conflict Points per Analysis Segment
-25
25
75
125
175
225
3 Year Crashes per Analysis Segment
Total Conflict Points
Proposed Conflict Points
Crash Data
FM 518
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
Southlake Collision Analysis
288 Total Crashes in 2006
13 signalized intersections
Over 100 Driveways
Over 2,000 Conflict Points
Corridor Crash Rate 3.2 crashes per MVM
(Texas Average 1.5 crashes per MVM)
Common Collision Types
Excessive Speed – 30%
Left Turn – 15%
Rear End – 10%
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
Southlake Crash Analysis (Continued)
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
Business Impacts
Research has been conducted nationally and locally to study the short and long term effects of raised medians
Center for Transportation Research (CUTR)
Texas Transportation Institute (TTI)
Iowa DOT
Texas Department of Transportation (TxDOT)
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
Business Impacts, Cont..
Overall all studies conclude that no adverse impacts have resulted
Some auto oriented businesses (gas stations) have experienced a negative impact, if access is poorly designed
Strip commercial corridors lacking identity and aesthetic elements have experienced negative economic impacts
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
Summary of Benefits
Improve Safety
Reduce crashes as much as 25%
Reduce Congestion
Increase roadway capacity from 23%-45%
Improve Mobility
Reduce travel time and delay as much as 40%-60%
Preserve Public and Private Investments
Access managed roadways maintain land value
Source: National Highway Institute Course No. 133078, April 2000
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
Source: Center for Urban Transportation Research
Lifecycle of Roadway
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
Aesthetics, building lasting value
Studies have shown that corridors planned with appropriate safety devices, landscaping, and good circulation maintain land value
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
How does one Determine Where to Place Median Openings?
Full openings and turn lanes
Median opening options
U-Turns
11 foot versus 12 foot lanes
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
How do we design turn lanes?
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
TxDOT Design Criteria
Specific design criteria has been established by TxDOT to protect the public
Preliminary median openings have been established using this criteria
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
Median Design
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
Median Treatments
TxDOT Roadway Design Manual
“Hooded” left turn
Dual “Hooded” left turn
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
11’ Lanes Median Width 20’ (8’ at intersections) From Village Center to Carroll
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
12’ Lanes Median Width 14’ (2’ at intersections) Village Center to SH114/Carroll to Pearson
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
Median Opening Locations
Need your input to bring our recommendations to TxDOT for final engineering
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
Draft TxDOT Design
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
Addressing Pubic Comments
Additional opening added to increase access
All opening locations will require TxDOT approval
Deviations from TxDOT’s design criteria will have to be negotiated. Nothing is final.
Maintenance of medians will also be negotiated
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
Design Treatments
Urban Design Study:
Freeway Corridor
Gateways
Thoroughfares
Southlake Boulevard
Davis/Randol Mill
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
Design Treatments
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
Design Treatments
Design Principles
Unity with Variety
Sustainability
Drought tolerance
Minimize Maintenance requirements
Pulse Points
Southlake Identity
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
Thoroughfares
Town Center
Estate Residential
Commercial Parkway
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
Thoroughfares
Medians
Key Intersections
Gateway Locations
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
Town Center
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
Commercial Parkway
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
Estate Residential
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
TxDOT Median Design Criteria
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
Next Steps
Address Comments from tonight
Coordinate with TxDOT
Continue with Urban Design Study
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
Discussion and Public Input
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
appendix
Not to be shown unless needed
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
Storage Lengths at Key Intersections
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
TxDOT’s Landscape Manual
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
Plantings and Safety
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
Plantings and Safety
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
Landscaping in Medians
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
Landscaping in Medians
TOWNSCAPE, Inc. T o w n P l a n n i n g & D e s i g n f o r L i v a b l e
C o m m u n i t i e s
Source: Stover and Koepke, Transportation and Land Development
Market Area Preservation
45 mph
As your speeds improve your market area increases