The document summarizes traffic and cost statistics related to transportation in Texas: - The average annual cost for a driver due to vehicle operating costs, congestion, and crashes in Texas is $1,740. - 19% of intersections in the Dallas-Fort Worth region are in need of repair. - The average number of hours lost to congestion per individual per year in the Dallas-Fort Worth region is 45 hours. - The total annual cost of traffic for Texas residents is $25.1 billion.

1. $ 1,740 Avg. cost for a driver caused by
VOC, congestion and crashes,
(total cost per year - TX residents)
19%
% of intersections that are in need
for repair in the DFW region
45 hours
No. of hrs. lost in congestion /
individual / year in the DFW region
**Cited from TRIP (a national transportation research group - July ‘14)
$ 25.1
billion
* VOC —> Vehicle Operating Costs (including fuel)

2. 1. What is a DDI?
Do you know the DDI better than the rest?
A. Destructive Devices
Industry
B. Development
Dimensions International
C. Device Dependent
Interface
D. Diverging Diamond
Interchange

3. 2. By what % does the DDI reduce
traffic?
Do you know the DDI better than the rest?
A. 20% - 30% B. 30% - 40%
C. 40% - 50% D. 50% - 60%

4. VIDEO DELETED TO REDUCE
SPACE

5. 3. Based on historical data, by what % have crashes
reduced because of the DDI?
Do you know the DDI better than the rest?
A. 60 % B. 20 %
C. 50 % D. 30 %

6. 4. What is the typical cost of constructing the DDI
compared to an alternative design?
Do you know the DDI better than the rest?
A. 60 - 70 % less B. 10 - 20 % more
C. 40 - 50 % more D. 20 - 30 % less

7. Decision Support System
Diverging Diamond Interchange
for the DDIDSS
Prepared by:
Ade Keleko
Brian Sturm
Maithreya Chakravarthula
Margaret Quintero
Mary Kim
Phillip Watz
Saad Aziz
VIDEO
DELETED TO
REDUCE
SPACE

8. Agenda
• Review of the data and the data sources used - raw and predicted data
• Description of the database and the relations between tables (access)
• Explanation of the analytics layer on excel
• Showcase of the user interface
• Preview of the presentation layer

9. Objectives!
• Develop a ‘traffic decision-support system’
• Identify viable intersection locations
• Ranking of candidate intersections for DDI
• Documentation of prototype (include analysis, design, and creation)

10. DATA: (Comprehensive traffic & toll revenue study by NTTA)
RESULTS
SCALED SCALED
- Safety
- Time
- Cost
AFTER ANALYSIS
Safety
Time
Cost

11. Preston / SRT
City: Plano
Authority: NTTA
Avg. Daily Total Traffic: 96250 vehicles (E-W bound) / yr
*During 4 peak periods
% of left turns: 25 %
Existing Lane Width: 14 Feet
- Safety
- Time
- Cost
Sample Data
Excel Datasheet

12. Daily Total Traffic: 300 vehicles
Preston / SRT
Comparison between a DDI & a conventional interchange
DDI
Average delay per vehicle
Standard
21.1 sec5 sec
Average delay @ Preston / SRT 1500 sec 6330 sec
25 min 105 min
* Per day
* Per day for 300 vehicles
Average Delay / year: 133 Hrs. 564 Hrs.
reduction in delay!!76 %
** Gathered the data from
http://www.hdrinc.com/sites/all/files/content/white-papers/white-paper-images/4623-diverging-diamond-interchanges-answers-to-frequently-asked-questions.pdf

13. Impact of intersection types for
“SRT / Preston”
*Higher score the better

14. reduction in traffic50 %
reduction in Cost75 %
reduction in 911 Delays25 %
Benefits of a DDI

15. ARCHITECTURE
NTTA.org
TXDOT.gov
ATT
Provided
Other Misc.
sources
SQL
(DataBase)
MS Access
(Backup
Database)
DATABASE LAYER ANALYTICS LAYER USER INTERFACE LAYER PRESENTATION LAYER

16. DEMO