CC8 Traffic Testing Plan

 

Gear Configuration

The NAPTF test vehicle consists of two carriages, a north carriage and a south carriage, each of which can be configured using up to 10 wheels. In the CC8 Phase 1 test, two gear configurations were used, a two-wheel (D) and four-wheel (2D).  The dimensions of the load configuration are illustrated in the figure below.  The dual spacing was 54 inches and the tandem spacing was 57 inches.

                                                                                                         

 

Wheel Load/Tire Pressure

The CC8 Phase 1 traffic test was conducted in a number of stages. The dates, test vehicle configurations, wheel loads, and loading passes for each stage of trafficking are summarized in the table below. The nominal tire inflation pressure for all load levels was 220 psi, although actual tire pressures during testing varied with traffic.

 

 

Dates
(all 2016)

Traffic Type

Wheel Load, lbs.

Wanders (North)

Wanders (South)

Cumulative Passes

22 Feb

Normal I

20,000

1

1

66

22 Feb

Overload I

21,500

0

1

132

Overload I

22,500

0

1

198

Overload I

23,000

0

1

264

Overload I

24,000

0

1

330

Overload I

25,000

0

1

396

23-24 Feb

Normal I

20,000

19

19

1650

25 Feb

Normal II

28,000

1

1

1716

25-26 Feb

Overload II

28,500

0

1

1782

Overload II

29,500

0

1

1848

Overload II

30,500

0

1

1914

Overload II

31,500

0

1

1980

Overload II

32,500

0

1

2046

26 Feb -
2 Mar

Normal II

28,000

36

36

4422

9-15 Mar

Normal II

28,000

33

0

6600

14-19 Sep

Normal II

28,000

28

0

8448

 

Wander Pattern

The pavement test vehicle simulates a normal distribution of aircraft traffic during traffic testing.  The wander pattern used for the traffic testing consists of 66 vehicle passes, arranged in 9 wander positions.  The below figure shows the CC8 Phase 1 wander positions.  Offsets from the centerline are given in feet. Note that the offset dimension refers to the distance to the center of the load module, which is midway between the tires. This figure should be used in reference to the track numbers given in the database.

 

 

 

To download the entire wander table as used on the NAPTV, click here   (CC8 Ph 1 Carriage Positions for 1 Full Wander.pdf)

Return to Construction Cycle 8 Phase 1 Overview