Zacytuj

Fig. 1

The study area.
The study area.

Fig. 2

Determination of minimum number of sample units to be surveyed.
Determination of minimum number of sample units to be surveyed.

Fig. 3

Asphalt pavement inspection sheet for Sample No. 278, Al-Fiush Road.
Asphalt pavement inspection sheet for Sample No. 278, Al-Fiush Road.

Fig. 4

Flexible pavement deduct values, Distress 7, edge cracking.
Flexible pavement deduct values, Distress 7, edge cracking.

Fig. 5

Flexible pavement deduct values, Distress 13, potholes.
Flexible pavement deduct values, Distress 13, potholes.

Fig. 6

Corrected deduct values for flexible pavements.
Corrected deduct values for flexible pavements.

Fig. 7

High-severity edge cracking in Sample No. 278, Al-Fiush Road.
High-severity edge cracking in Sample No. 278, Al-Fiush Road.

Fig. 8

Medium-severity potholes in Sample No. 278, Al-Fiush Road.
Medium-severity potholes in Sample No. 278, Al-Fiush Road.

Fig. 9

Thickness design requirements for flexible pavements.
Thickness design requirements for flexible pavements.

Asphalt concrete pavement distress types and M-and-R alternatives

M-and-R MethodDo NothingCrack SealPartial Depth PatchFull Depth PatchSkin PatchPothole FillingApply Heat & Roll SandApply Surface Seal EmulsionApply RejuvenationApply Aggregate Seal CoatNotes
Distress Type
1 Alligator CrackingM, HM, HLL
2 BleedingLL, M, H
3 Block CrackingLL, M, HLL, M
4 Bumps & SagsLM, HM, HM, H
5 CorrugationLM, HM, H
6 DepressionLM, HM, HM, H
7 Edge CrackingLL, MM, HM, HIf predominant, apply shoulder seal, e.g., aggregate seal coat
8 Joint Reflective CrackingLL, M, HH
9 Lane/Shoulder Drop OffLIf predominant, level off shoulder and apply aggregate seal coat
10 Longitudinal Transverse CrackingLL, M, HHLLL, M
11 Patching & Utility CutLMH*H**Replace patch
12 Polished AggregateAA
13 PotholesLL, M, HL, M, H
14 Railroad CrossingLL, M, H
15 RuttingLL, M, HM, HL, M, H
16 ShovingLM, H
17 Slippage CrackingLLM, H
18 SwellLM, H
19 Weathering & RavelingLHL, MLM, H

PCI rating

PCIRating
85–100Excellent
70–85Very good
55–70Good
40–55Fair
25–40Poor
10–25Very poor
00–10Failed

Structural composition of Al-Fiush Road pavement

No.LayerThickness, cm (in)CBR
1Subgrade10
2Sub-base30 (11.8)20
3Base20 (7.9)50
4Surface7 (2.75)
Total thickness57(22.45)

Traffic in passenger car equivalent units (PCUs) on sections of Al-Fiush Road

No.Vehicle typePCUSouthboundNorthbound
VehiclesPCUVehiclesPCU
1Passenger car14,6844,6843,7823,782
2Two-axle trucks22,6795,3583,4366,872
3Trucks with ≥3 axles21,1352,2701,4862,972
Total PCU12,31213,626

PCI of additional samples for sections of Al-Fiush Road

Sample No.PCISample No.PCISample No.PCI
1271058121726
17821288122051
30461583223060
84731738723767
878819917Average PCI59.5

Pavement design index

Traffic categoryPavement design index for road or street classification
ABCDEF
I222111
II322221
III444332
IV555443
IVA666554

PCI values of Al-Fiush Road sections

No.Sample No.Sample unit area, m2 (ft2)PCIRating
12213.5 (2,300)80Very good
225213.5 (2,300)100Excellent
348213.5 (2,300)91Excellent
471213.5 (2,300)78Very good
594213.5 (2,300)90Excellent
6117213.5 (2,300)88Excellent
7140213.5 (2,300)73Very good
8163213.5 (2,300)81Very good
9186213.5 (2,300)78Very good
10209213.5 (2,300)70Very good
11232213.5 (2,300)65Good
12255213.5 (2,300)62Good
13278213.5 (2,300)67Good
14301213.5 (2,300)92Excellent
15324213.5 (2,300)90Excellent
Average PCI of sections80.3Very good

Road classification based on DHV

Effective DHV (equivalent passenger cars per hour)
ClassRoadStreet
A≥900≥1,200
B720–8991,000–1,199
C450–719750–999
D150–449250–749
E10–14925–249
F<10<25
eISSN:
1847-6228
Język:
Angielski
Częstotliwość wydawania:
Volume Open
Dziedziny czasopisma:
Engineering, Introductions and Overviews, other