Phoenix, Arizona, United States
Limitations in current traffic monitoring abilities are an ongoing negative issue for the Arizona Department of Transportation (ADOT) and for its customers in both urban and rural areas. In this research project, Texas Transportation Institute (TTI) performed a state-of-the-practice review that intended to assist the ADOT and other Arizona transportation agencies in identifying the most important technologies for detecting vehicles and determining traffic volume, speed, and lane occupancy. Their research aimed to assist these transportation agencies in making informed decisions so that they can invest wisely. The scope of this project required the development of a design for a detector testbed facility, which ADOT proposed to develop in the Phoenix area in the near future.
The research objectives were to:
- Gather information on the current vehicle detection systems used in Arizona.
- Identify the most promising vehicle detection technologies to meet the needs of ADOT and other Arizona agencies.
- Identify candidate test sites, develop preliminary site design, and develop field test evaluation plan.
- Develop a detailed design of the detection testbed on the selected freeway segment.
Program Budget:
The initial cost of the testbed included detectors sufficient to ultimately cover eight lanes in the westbound direction (there were seven lanes at the start of the study) and six lanes in the eastbound direction. Besides the detectors, the total cost estimate includes a 12 ft by 12 ft node building, three equipment cabinets, inductive loops for the baseline system, conduit, and boring. The total cost of the facility is estimated to be approximately $566,000. Some components were provided by ADOT at no cost to the project. However, all proposed traffic detector systems evaluated were included in the budget estimate. Other major cost elements included infrastructure, communications, detector mountings, node building, design package, construction management, and contingency.
Anticipated initial testbed costs are shown in the table below:
Description |
Unit
|
Qty Ph1
|
Qty Ph2
|
Unit Cost ($)
|
Phase 1 ($)
|
Phase 2 ($)
|
Total Cost ($)
|
---|---|---|---|---|---|---|---|
8 ft chain link fence, 10' x 10' |
LF
|
40
|
0
|
12.95
|
518.14
|
-
|
518.14
|
Pedestrian gate (4'X 6') (Barb top) |
EA
|
1
|
0
|
355.00
|
355.00
|
-
|
355.00
|
Concrete pad, 12' x 12' |
SF
|
144
|
0
|
34.73
|
5,001.12
|
-
|
5,001.12
|
Lightning rods and cable |
EA
|
1
|
0
|
250.00
|
250.00
|
-
|
250.00
|
Hardware firewall |
EA
|
1
|
0
|
650.00
|
650.00
|
-
|
650.00
|
Industrial computers |
EA
|
0
|
0
|
2,500.00
|
-
|
-
|
-
|
Weather station |
EA
|
0
|
1
|
5,000.00
|
-
|
5,000.00
|
5,000.00
|
Network Ethernet hubs (high temperature) |
EA
|
1
|
1
|
400.00
|
400.00
|
-
|
400.00
|
Direct burial Ethernet cable |
LF
|
0
|
525
|
0.31
|
162.75
|
-
|
162.75
|
Barriers and crash cushions |
LF
|
0
|
0
|
-
|
-
|
-
|
-
|
Roadway bore and 4" conduit |
LF
|
270
|
236
|
63.00
|
17,010.00
|
14,868.00
|
31,878.00
|
2' x 4' pullboxes (use ADOT #7 with extension) |
EA
|
6
|
5
|
1,500.00
|
-
|
-
|
-
|
3' x 5' pullboxes (use ADOT #9 pullbox) |
EA
|
5
|
1
|
3,400.00
|
17,000.00
|
3,400.00
|
20,400.00
|
Install pullboxes (#7) |
Lump
|
1
|
0
|
8,000.00
|
5,000.00
|
3,000.00
|
8,000.00
|
Surge protector for power service |
EA
|
1
|
0
|
150.00
|
150.00
|
-
|
150.00
|
Peek ADR-6000 (8 lanes WB and 6 lanes EB) |
EA
|
1
|
1
|
35,000.00
|
45,000.00
|
35,000.00
|
80,000.00
|
Loop installation for Peek ADR-6000 |
Lump
|
1
|
1
|
3,000.00
|
24,000.00
|
18,000.00
|
42,000.00
|
Traffic Control for Installing ADR-6000 loops |
LA
|
8
|
6
|
2,000.00
|
16,000.00
|
12,000.00
|
28,000.00
|
SmartSensor SS-125 vehicle detector |
EA
|
1
|
1
|
8,000.00
|
8,000.00
|
8,000.00
|
16,000.00
|
Autoscope Solo Pro |
EA
|
1
|
1
|
6,500.00
|
6,500.00
|
6,500.00
|
13,000.00
|
Sensys Networks mag. & epoxy (14 lanes, 2/la) |
EA
|
16
|
12
|
465.00
|
7,440.00
|
5,580.00
|
13,020.00
|
Sensys Networks Access Point & hardware |
EA
|
1
|
1
|
3,300.00
|
3,300.00
|
3,300.00
|
6,600.00
|
GTT (3M), detector cards (all lanes) |
Lump
|
1
|
1
|
-
|
17,170.40
|
12,877.00
|
30,048.20
|
GTT (3M) bore (initiate from median) |
LF
|
232
|
184
|
50.00
|
11,600.00
|
9,200.00
|
20,800.00
|
Pole structure 40' to be provided by ADOT |
EA
|
1
|
1
|
20,000.00
|
-
|
-
|
-
|
Pole structure 40' to be provided by ADOT |
EA
|
1
|
1
|
3,000.00
|
3,000.00
|
3,000.00
|
6,000.00
|
4" PVC conduit (pull box interconnect, etc) |
LF
|
302
|
178
|
28.00
|
8,456.00
|
4,984.00
|
13,440.00
|
1" PVC conduit (for fiber connection) |
LF
|
200
|
0
|
18.00
|
3,600.00
|
-
|
3,600.00
|
3" PVC for pull box interconnections, power, coaxial |
197
|
198
|
25.00
|
4,925.00
|
4,950.00
|
9,875.00
|
|
3" steel conduit for sign bridge |
LF
|
98
|
78
|
93.00
|
9,114.00
|
7,254.00
|
16,368.00
|
Equipment cabinets, large (Type 341) by ADOT |
EA
|
3
|
1
|
8,000.00
|
-
|
-
|
-
|
Cabinet foundations |
EA
|
3
|
1
|
2,000.00
|
6,000.00
|
2,000.00
|
8,000.00
|
Equipment cabinets, small (Type 343) by ADOT |
EA
|
2
|
1
|
2,000.00
|
-
|
-
|
-
|
Node building (small) |
EA
|
1
|
0
|
32,000.00
|
32,000.00
|
32,000.00
|
|
Subtotal |
252,602.41
|
158,913.80
|
411,516.21
|
||||
Bid package (10% of Subtotal) |
Lump
|
1
|
25,260.24
|
15,891.38
|
41,151.62
|
||
Construction management (15% of Subtotal) |
Lump
|
1
|
37,890.36
|
23,837.07
|
61,727.43
|
||
Grand Subtotal |
315,753.01
|
198,642.25
|
514,395,26
|
||||
Contingency (10%) |
31,575.30
|
19,864.23
|
51,439.53
|
||||
Grand Total |
347,328.31
|
218,506.48
|
565,834.79
|
State of the Art Evaluation of Traffic Detection and Monitoring Systems, Volume I - Phases A & B: Design
Establishing a vehicle detector testbed (in 2007 dollars): $566,000.