Civil Engineering Department

Design of Nablus Tulkarm Highway

Prepared byAhmed Mohammed Mustafa

Anas Zeyad Belbeasi

Under the Supervision ofDr. Khaled Al Sahili

Nablus- PalestineDec. 2010

Apr 22, 20231Design of Nablus Tulkarm Highway

Introduction

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Road Description Nablus Tulkarm Highway is a major road that

connects two of the major Palestinian cities; Nablus and Tulkarm, with a length about 27 km.

The study case of the road is located between two Israeli checkpoints; Enab and Shefi Shomron checkpoints. with length is about 5.5 km.

The following Google Earth picture describe the study case of the road.

Apr 22, 20233Design of Nablus Tulkarm Highway

objectives

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1) Evaluation of the exiting design2) Redesign and improve the highway3) Prepare Bill Of Quantities4) Design all details related to the highway

Traffic studies

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Three counts are conducted1. Wed 2/6/2009 between 6:00 AM - 6:00 PM (Beit

lead Intersection)

2. Wed 9/6/2009 between 6:00 AM - 6:00 PM (Tanib Factory)

3. Tue. 23/2/2010 between 3:00 - 5:00 PM (Tanib Factory)

Results of traffic counts

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The count

PHPHV (Veh/hr)PHF

AMPMAMPMAMPM

Tanib Brick Factory count

7:45 - 8:452:15 - 3:155756370.8870.862

Beit lead intersection count

7:30 – 8:303:15 – 4:153703620.8400.856

DHV

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DHV = 0.1 * ADT

  

Design control and criteria

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Functional classification Based on AASHTO, the highway can be classified as Rural Minor

Arterial HighwayDesign Vehicle based on vehicle classifications and AASHTO recommendations, WB-

62 is chosen to be the design vehicle Design Speed The highway is divided into three zones depending on the design

speed:o From station 0+000 to station 2+700 v = 110

km/hro From station 2+700 to station 3+200 v = 100

km/hro From station 3+200 to station 5+421 v = 90 km/hr 

Design control and criteria

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LOS by analyzing the LOS for the two lane (which is the

existing ) for a 20 years period, the LOS is founded to be E, which is not accepted for such highway.

So, the analysis is done based on four lane and founded to be B, which is suitable for such a

highway.

Pavement Design

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part one (from station {0+000 to 1+250}, {1750 to 2+150}, {3+000 to 3+400}, and {4+300 to 4+700} ) will be designed based on CBR value of 3, part two (from station {1+250 to 1+750}, {2+150 to 3+000}, {3+400 to 4+300}, and {4+750 to 5+420}) will be designed based on CBR value of 20.

Design Considerations

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Pavement performance ∆PSI = Pi – Pt = 2. Traffic Roadbed soil ( subgrade material ) and Material of construction and

Environmental

Reliability ( R = 95 %, S. =0.45 )

LayerCBRMram

BC8028,000 Ib/in2

0.1330.9

SB4017,500 Ib/in20.120.9

AS450,000 Ib/in20.44

SBPart 134500

Ib/in2

Part 22012,900 Ib/in2

2.23* 10^6

PAVEMENT DESIGN USING AASHTO METHOD

R% = 95%S0 =0.45ESAL 2.23 *10^6Mr = 4500 SN=4.7

Results

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Surface layer thickness D1

(cm )

Base layer thickness D2

(cm )

Subbase layer thickness

D3 (cm )

Part one104040

Part two101515

After Modification

Surface layer thickness

D1 (cm )

Base layer

thickness D2 (cm )

Subbase layer thickness

D3 (cm )

Rockfill layer

(cm)

Part one10202050

Part two1015150

Design Criteria for Horizontal Curves

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Radius As design speed equal 110 km/hr the superelevation equal 6% Rmin = 560 m. As design speed equal 100 km/hr the superelevation (Table 3.14 Equal 6% Rmin = 435 m. AASHTO 2001)As design speed equal 90 km/hr the superelevation Equal 6% Rmin = 335 m.

Super elevation It is assumed to be 6 %Min. Length L min= 3*110 = 330 m (for v = 110 km/hr) L min= 3*100 = 300 m (for v = 190 km/hr) L min= 3*90 = 270 m (for v = 90 km/hr)

Results of Horizontal Curves

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Design Criteria for Vertical Curves

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Terrain For Nablus Tulkarm Highway, the terrain where the road

passes is level so, highway sight distance are generally long or can be satisfied.

Grade Since the terrain is level, in the project design the grade

doesn't reach the max. grade which is 4 %, and also the min. grade is satisfied.

Results of Vertical Curves

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No.TypeLength (m)St. of PVIG 1%G 2%

1Sag1500+375.64-1.76-0.69

2Crest1500+545.35-0.69-1.43

3Sag1500+901.49-1.43-1.34

4Crest1501+625.00-1.34-1.84

5Sag1501+847.94-1.84-1.13

6Sag1502+382.85-1.13-1.07

7Crest1502+705.00-1.07-1.95

8Sag1502+934.04-1.06-1.95

9Crest1503+530.00-1.38-1.06

10Sag1503+980.28-1.26-1.38

Cross Section Element Design

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The cross section elements are designed based on AASHTO recommendation to be as follow:

1. Lanes : 3.6 m for each2. Shoulder: 2.5 m for each3. Median: 3 m4. Cross slopes: 2% (for traveled lanes) and 4% for shoulders.5. Side slopes: 1:3 6. Sloped curb stones are used for median Cross Section Details1. Guard rail2. Ditches3. Culverts

Typical cross sections for part one

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Typical cross section for part two

Intersection design

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All intersections in this project are “T” intersections.The project contains 4 main intersections, which are

: 1. Ramallah intersection 2. Beit lead intersection 3. Ramin intersection 4. Enab intersectionThe angle of all intersections is 90˚ Rmin= 37 m ,

with offset=1.3 m, and taper 30:1 Sample of intersection deign shown below.

Ramallah intersection

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Ramin intersection

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BOQ

No.DescriptionUnitQuantity

1ExcavationC.M63,881

2EmbankmentC.M26,507

3Rock FillC.M29,746

4Sub BaseSq. m123,873

5Base CourseSq. m118,426

6Prime Coat (MC 70)Sq. m113,000

7AsphaltSq. m112,369

8Pipe Culverts 1m ФL.m198

9Guard RailL.m1480

10Precast concrete Curb Stone

L.m9500

11Ready mixed concreteC.M1600

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Recommendations

Adoption of suggested new design

The Drainage system should be improved .Not to cot the trees that are located within

the boundary of our road design, and replant these trees outside the road.

Give the accurate priority of the road. make a maintenance program for the road

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