generating an od table with disaggregated zone structure for land development program
DESCRIPTION
Generating an OD Table with Disaggregated Zone Structure for Land Development Program. 12 th TRB National Planning Application Conference Xiaobo Liu, Ph.D. Adam Lanigan John Pavlovich, P.E. Jacobs Engineering Group 299 Madison Ave Morristown, NJ 07962. Introduction. - PowerPoint PPT PresentationTRANSCRIPT
12th TRB National Planning Application Conference
Xiaobo Liu, Ph.D.Adam Lanigan
John Pavlovich, P.E.
Jacobs Engineering Group299 Madison Ave
Morristown, NJ 07962
Generating an OD Table with Disaggregated Zone Structure for
Land Development Program
Introduction
The aggregated TAZ structure in regional planning models cannot provide adequate information for land development planning applications
How to employ detailed trip generation to create an OD table in the land development area while maximizing flexibility and efficiency for planning analysis?
The paper presents a simple, effective and efficient approach to investigate the traffic patterns with more accuracy
Determining TAZ StructureMaximizing disaggregation of the TAZ structure would
provide the most detailed information for planning purposes and traffic operational analysis
The disaggregated zones could be grouped into different sectors/blocks for trip generation to fit the land development programs
This could improve the flexibility and efficiency of updating the different elements during the planning procedure, such as updating the type and intensity of land development, various access plans, and geometric layouts
Proposed Procedure
Setup Disaggregated “Zone” Structure
Disaggregated P/A Assignment
Traffic Directional Distribution
Trip Generation - block based
Land Development Program - block based
Regional Demand Model
I-E /E-I Distribution
I-I Distribution
E-E Distribution
Normalization
O-D Table
Converting Block to “Zone” Structure
RIVER BEND DEVELOPMENT PLAN
RIVER BEND DEVELOPMENT PLAN
Issues:
• Assess Multiple Development Scenarios
RIVER BEND DEVELOPMENT PLAN
Issues:
• Assess Multiple Development Scenarios• Formulate Multi-Phase Land Use Mix
RIVER BEND DEVELOPMENT PLAN
Issues:
• Assess Multiple Development Scenarios• Formulate Multi-Phase Land Use Mix• Maximize Retail Component
RIVER BEND DEVELOPMENT PLAN
Issues:
• Assess Multiple Development Scenarios• Formulate Multi-Phase Land Use Mix• Maximize Retail Component • Minimize Parking Requirements
RIVER BEND DEVELOPMENT PLAN
Issues:
• Assess Multiple Development Scenarios• Formulate Multi-Phase Land Use Mix• Maximize Retail Component • Minimize Parking• Fast Track analysis
RIVER BEND DEVELOPMENT PLAN
Issues:
• Assess Multiple Development Scenarios• Formulate Multi-Phase Land Use Mix• Maximize Retail Component • Minimize Parking• Fast Track analysis• Set Final Street Network
Conventional Approach
Shortcomings:• No O-D Table• Lack of I-I trip generation that could be essential for urban area• Analyzing alternatives requires manual adjustments and traffic assignment: time consuming, labor intensive, and error prone
Land Development Program
• Development area consists of 12 blocks (A-L) based on roadway boundaries• Each block has different land use plan• Land development program including the size of the development and land use, was changed frequently by developer to achieve max marketing• Roadway access was also updated over several iterations to provide best access to the site• 32 zones proposed in the study area, including 2 external zones and 30 internal zones.
Land Use Plan
Converting Trips from Block to “Zone”
Trip GenerationTRIP GENERATION
ITE
LU Code Units Mult.
Res. Condo 230 DU 1Hotel (1) 310 Room 1Movie Theater w/Matinee (2) 444 1K GFA 1Health/Fitness Club (3) 492 1K GFA 1General Office 710 1K GFA 1Medical Office (4) 720 1K GFA 1Free Standing Discount Superstore (5) 813 1K GFA 1Shopping Center 820 1K GFA 1Shopping Center (JC Penney) 820 1K GFA 1Quality Restaurant (6) 931 1K GFA 1Hi-turnover Restaurant (7) 932 1K GFA 1Supermarket 850 1K GFA 1
Block A TOTALS
LU Type
Total Enter Exit Sub-Total Total Enter Exit Total Enter Exit
Res. Condo 0 0 0 0 0 0 0 0 0 0Hotel (1) 0 0 0 0 0 0 0 0 0 0Movie Theater w/Matinee (2)0 0 0 243 230 147 83 1,643 920 723Health/Fitness Club (3) 0 0 0 0 0 0 0 0 0 0General Office 591 519 72 575 433 61 372 118 63 55Medical Office (4) 0 0 0 0 0 0 0 0 0 0Free Standing Discount Superstore (5)0 0 0 0 0 0 0 0 0 0Shopping Center 84 51 33 238 158 79 80 252 131 121Shopping Center 0 0 0 0 0 0 0 0 0 0Quality Restaurant (6) 0 0 0 0 0 0 0 0 0 0Hi-turnover Restaurant (7) 0 0 0 0 0 0 0 0 0 0Supermarket 0 0 0 0 0 0 0 0 0 0
675 570 105 1,056 821 287 534 2,014 1,114 900
Saturday PHG AM Peak Hour PM Peak HourLand Use Type
AM PM SAT AM&PM Trips SAT AM PM SAT
Enter Exit enter/exit enter/exit enter/exit enter/exit enter/exit enter/exit33% 53% 0% 35% 5% 0% 0% 0% Res. Condo10% 10% 0% 0% 0% 0% 0% 0% Hotel (1)5% 5% 5% 20% 20% 0% 0% 0% Movie Theater w/Matinee (2)5% 5% 5% 0% 0% 0% 0% 0% Health/Fitness Club (3)37% 22% 0% 35% 35% 0% 0% 0% General Office37% 22% 0% 35% 35% 0% 0% 0% Medical Office (4)31% 35% 10% 0% 5% 0% 17% 23% Free Standing Discount Superstore (5)31% 35% 5% 10% 20% 0% 23% 24% Shopping Center31% 35% 5% 10% 20% 0% 23% 24% Shopping Center5% 5% 5% 0% 5% 0% 44% 0% Quality Restaurant (6)10% 10% 10% 0% 10% 0% 43% 0% Hi-turnover Restaurant (7)15% 15% 5% 0% 5% 0% 36% 0% Supermarket
Land Use TypePass by Traffic CreditInternal Capture Rates MassTrans
Production/Attraction Assignment
• Obtain trip productions and attractions for the land development area from ITE Trip Generation Manual• Breakdown block-based Productions/Attractions into zone-based
Internal-External External-Internal Distribution
• The proportion of the total trips generated from internal zones to external zones (and external to internal) could be determined from a regional demand model or local knowledge of the development area• Include pass-by trips to the development zones in the O-D distribution
Internal-Internal Distribution• Production trips are used as the base• I-I trips are distributed using a gravity model based on the internal zone activity (multiply or add weight)
External-External Distribution
• Determine the distribution of external zone to external zone traffic from a regional demand model• Credit the pass-by trips to the development zones credited from the E-E trips
Total Vehicle TripsEXAMPLE:
TOTAL TRIPS 100 LESS TRANSIT ADJUSTMENT 15NET TOTAL TRIPS 85
LESS
INTERNAL/INTERNAL TRIPS 18 EXTERNAL/EXTERNAL PASS BY TRIPS 27
NET NEW VEHICLE TRIPS GENERATED 40
O-D Table and Applications
Results
Phased Land Use Development Program by Block
Sizing of Parking Facilities
Fast-tracking of Street Infrastructure
Ability to Evaluate Changes in Land Use Elements to Respond to Economic Conditions
Questions?
Contact:
John Pavlovich – [email protected]
Adam Lanigan – [email protected]
Xiaobo Liu – [email protected]