Creating a Transportation Database Using a Linear Referencing System(LRS)

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Nathan Gibbs
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1 Creating a Transportation Database Using a Linear Referencing System(LRS) Project Overview and Methodology Raja Andela and Sujatha Mohanakrishnan Toledo Metropolitan Area Council of Governments 1

2 TMACOG is.. l Toledo Metropolitan Area Council of Governments l Northwest Ohio s MPO (Metropolitan Planning Organization) l TMACOG Transportation Department is charged with planning transportation in Lucas and Wood Counties and southern Monroe County in Michigan. l Transportation Staff 10. Only 2 people working on GIS, apart from other responsibilities. 2

3 We are here. 3

4 Why Transportation Database? l Numerous sources of data into the same platform l Ability to analyze this information. l Ability to easily integrate data provided by Ohio Department of Transportation (ODOT) and Michigan Department of Transportation (MDOT) 4

5 Integrated Transportation Database Related Projects Traffic Flow Map Analyze Transportation Improvement Program (TIP) projects with crash data, volume, pavement condition ratings, etc. Long Range Plan Travel Demand Model.. And various other maps 5

6 Database Structure Model Network Hot spot, Safety Traffic Counts TIP Projects ITD Pavement Condition Bridge Condition Functional Class Crash Information 6

7 Linear Referencing Linear referencing acts as a framework to support different kinds of related data Accessibility to ODOT and MDOT data Dynamic Segmentation capability to overlay and analyze 7

8 TMACOG Network Vs State Network l TMACOG Network Stick Network Divided highways 2 links for each direction l ODOT Network Divided highways has one route State network is up to date Local Network is obsolete Has route mileage information Point Shapefile with mileage (Control Points) 8

9 Conflation l Equivalency To be able to plot TMACOG links on ODOT network, We need Route ID From Log To Log 9

10 Conflation Methods l Spatial join l Attribute transfer mapping (for ramps) l Locate features along the routes (for Michigan) l Manual conflation 10

11 Spatial Join ODOT Control points CLUCCR00022**C M= 2.1 COG_ID= EL-0423 CLUCCR00022**C M=

12 Result of Spatial Join (Ohio) 25% join 12

13 Attribute Transfer Tool l There is one to one relationship between TMACOG network ramp and ODOT ramps l Attribute transfer mapping 13

Manual Conflation Using Digitize Events Tool http://edndoc.esri.com/arcobjects/9.0/default.

14 Manual Conflation Using Digitize Events Tool 14

15 Locate route events Example One CLUCCR00008**C 3.86 Buffer of 100 feet EL

16 Locate route events Example Two CLUCCR00008**C Buffer of 100 feet 3.86 EL

17 Result of Locate Route Events (Michigan) 17

18 ITD Products Traffic Flow Map Traffic counts from ODOT TIP Maps Long Range Plan Pavement Condition Crash Locations Bridge Condition Travel Demand Model.. And various other maps 18

19 Traffic Flowmap 19

20 T I P Map Current TIP map developed using ODOT LRS 20

21 TIP Project Analysis 21

22 Future Projects l County Centerline l Maintenance Crash Locations Updated Traffic Counts Bridge Conditions Pavement Conditions 22

23 Thank You Questions???? 23

Transforming the Maricopa County Department of Transportation (MCDOT) GIS-based Transportation Asset Inventory System June 30, 2016

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