APPENDIX L.   TEST SURFACE PFC DATA


TABLE L-1. TEST SURFACE PEAK FRICTIONAL COEFFICIENTS (PFC)
FIRST TEST ROUND, PRETEST MEASUREMENTS, 9/30/99
Dry Surface      Wet Surface
Test PFC Test Speed, Air Temp,   Test PFC Test Speed, Air Temp,
Number Number mph deg F   Number Number mph deg F
1 96.9 40.0 75   1 91.7 39.6 104
2 96.7 39.6 75   2 96.0 39.7 104
3 93.6 39.8 75   3 92.2 39.4 102
4 99.1 40.0 75   4 98.7 39.1 102
5 91.5 40.2 75   5 94.4 39.0 102
6 86.6 40.3 75   6 94.9 39.5 100
7 91.2 39.8 73   7 94.8 39.7 100
8 93.5 39.3 73   8 92.5 40.0 100
9 93.4 39.2 73   9 90.5 40.8 82
10 91.7 39.5 73   10 93.9 40.3 82
11 96.0 39.9 73   11 88.4 40.1 82
12 96.7 40.1 75   12 90.9 39.9 82
13 97.0 39.7 86   13 88.4 40.2 80
14 95.4 39.2 86   14 94.2 40.3 80
15 96.9 39.6 86          
16 90.7 40.0 86          
17 95.6 40.5 86          


TABLE L-2. TEST SURFACE PEAK FRICTIONAL COEFFICIENTS (PFC)
THIRD TEST ROUND, PRETEST MEASUREMENTS, 11/4/99
Dry Surface   Wet Surface
Test PFC Test Speed, Air Temp,      Test PFC Test Speed, Air Temp,
Number Number mph deg F   Number Number mph deg F
1 105.3 40.1 42   1 97.1 41.0 68
2 99.2 39.8 42   2 94.4 40.4 66
3 94.2 39.7 42   3 101.5 40.7 42
4 98.5 40.6 41   4 96.9 39.8 42
5 103.1 39.7 41   5 97.3 40.2 42
6 97.8 39.5 41   6 94.9 40.2 41
7 100.0 40.6 41   7 92.5 39.9 41
8 96.5 40.1 41   8 95.6 40.0 41
9 102.1 40.4 42   9 96.4 40.4 41
10 98.7 40.4 41   10 94.2 40.2 41
11 99.4 40.7 41   11 93.1 40.0 41
12 99.7 40.2 42   12 101.2 40.1 66
13 96.2 39.8 42   13 98.5 39.6 64
14 96.9 40.6 42   14 101.8 39.5 64
15 94.1 40.0 42   15 101.4 40.0 64
 
Third Test Round, Post-test Measurements, 11/5/99
1 99.3 39.1 64   1 98.5 40.0 68
2 100.7 40.0 64   2 99.8 39.8 64
3 88.3 39.2 64   3 95.1 39.3 64
4 95.9 40.8 64   4 99.7 39.2 62
5 100.3 40.6 64   5 96.2 39.3 62
6 99.2 40.2 62   6 98.2 39.3 62
7 88.8 40.1 64   7 95.0 40.4 62
8 90.6 40.5 64   8 95.2 40.0 62
9 89.9 40.7     9 92.8 40.0 62
10 90.3 41.0 62   10 93.9 40.3 62
11 100.6 39.8 82   11 92.6 40.3 62
12 98.1 39.0 80   12 93.2 40.2 62
13 95.4 39.0 80   13 94.2 40.1 62
14 98.8 39.8 80   14 92.3 40.0 62
15 90.2 40.0 80   15 95.4 39.7 62



TABLE L-3. TEST SURFACE PEAK FRICTIONAL COEFFICIENTS (PFC)
FOURTH TEST ROUND, PRETEST MEASUREMENTS, 11/17/99
Dry Surface      Wet Surface
Test PFC Test Speed, Air Temp,   Test PFC Test Speed, Air Temp,
Number Number mph deg F   Number Number mph deg F
1 95.6 40.2 51   1 91.6 39.8 48
2 97.5 39.7 51   2 90.9 39.9 48
3 91.4 39.9 51   3 90.0 39.6 49
4 96.9 40.8 51   4 89.6 39.4 49
5 93.8 40.3 50   5 92.2 39.1 49
6 93.6 39.5 50   6 93.7 39.7 49
7 95.5 39.9 53   7 93.3 39.8 49
8 95.4 39.3 53   8 92.3 40.2 49
9 93.6 39.7 51   9 91.5 40.3 50
10 93.7 39.9 51   10 90.4 40.8 50
11 94.4 40.2 51   11 92.5 40.6 48
12 96.8 39.4 51   12 89.8 40.2 48
13 93.8 39.3 51   13 89.6 39.8 48
14 97.7 39.8 51   14 87.8 40.3 48
15 92.8 40.2 51   15 93.1 40.3 48
 
Fourth Test Round, Post-test Measurements, 11/29/99
1 99.9 40.3 64   1 91.1 40.3 51
2 101.2 40.3 53   2 86.8 40.3 51
3 99.4 39.7 53   3 88.3 40.8 51
4 98.1 40.1 51   4 89.0 40.3 51
5 100.1 39.5 50   5 91.2 40.6 51
6 100.0 39.8 48   6 90.2 40.2 51
7 98.7 40.2 48   7 92.3 39.8 51
8 99.1 40.5 48   8 92.8 39.8 51
9 101.5 39.5 48   9 91.2 39.9 51
10 100.9 40.4 51   10 91.8 39.7 51
11 100.9 40.4 51   11 90.4 39.1 51
12 98.7 40.0 51   12 88.8 39.4 51
13 98.3 39.9 51   13 90.0 39.9 51
14 101.6 40.2 51   14 91.2 40.2 51
15 98.8 40.4 51   15 90.3 40.7 51
Post-test wet surface PFC numbers were developed from dry surface PFC data from the same day,
and were correlated to similar ratios from previously recorded dry and wet surface PFC data.