1. Database Development for Load-Restricted Zone in TexasBy
Pithon Vithayasricharoen

2. Objectives
To develop a procedure for projecting the load-restricted zones on a road map of Texas
To understand Linear Referencing and Dynamic Segmentation in ArcGIS
To perform a pilot test on the road system in Travis County in order to verify the effectiveness of the developed procedure

3. What is Load-Restricted Zone?
Sections of the transportation facilities legally posted to restrict excessive loading

4. Linear Referencing Using x,y,m coordinate system.
Each point along a linear feature has a measure value (m value)

5. Dynamic Segmentation
Allows multiple sets of attributes to be associated with any portion of a linear feature.
Consists of 2 components
Routes
Route Events
A unique identifier (Highway Name)
Measure Values (M Values)
Point Events
Line Events

6. Data Sources
The Street Network Shapefile of Travis County from BTS web site
Load-Restricted Zone Database from TxDOT
Milepoint Reference Marker Database from CTR

7. Create the Routes
Requirement
A unique identifier
A measurement system

8. Aggregate features

9. Export Shapefile to Geodatabase
Enable the Measure Values (M Values) of TravisRoad Feature Class
Contains M Values is
set to
Yes

10. M Values at Each Vertex
M Values are
NaN
(Not a Number)

11. Assign M Values VBA Script Code IMSegmentation
Important Interface for Dynamic Segmentation in ArcGIS
SetAndInterpolateMsBetween
Method for interpolating M values between minimum and the maximum M Values

12. M Values Populated by VBA Script Code

13. Route Events (Load-Restricted Zone)
7.813
0.040 – = 0.00
= 3.19
9999
1.984
5.969
0.040
0558
0562
0556
3.984
0.000
0000
0560

14. Create the Route Events Table
Using VB Code
Access Both Database
Create the Route Events Table in Ms Access
Create the Route Events Table for each county

15. Add Route Event Table in ArcGIS

16. Results

17. Future Work
Perform the Dynamic Segmentation for every county in the State of Texas
Develop the GIS-integrated database for Load-Restricted Zone of the highway network in the State of Texas

18. Acknowledgment Dr. David R. Maidment Dr. Zhanmin Zhang
Venkatesh Merwade
Uarporn Nopmongcol

19. Questions ?