Prepared by: 1.Jihad Ghanem 2.Fares Al kherashi 3.Hadeel Sadaqa Supervised by: Eng. Hussein Abu- Zant Dec 2015 Evaluation and Redesign of Haifa Street.

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Presentation transcript:

Prepared by: 1.Jihad Ghanem 2.Fares Al kherashi 3.Hadeel Sadaqa Supervised by: Eng. Hussein Abu- Zant Dec 2015 Evaluation and Redesign of Haifa Street

Outline Abstract Introduction Methodology Data collection level of service Detailed Visual Inspection(DVI) Results Pavement Evaluation and Remedial Actions Geometric Evaluation of Existing Condition Conclusions and Recommendations

Abstract Nablus City is one of the important cities in Palestine. It has a significance location that connects between cities in Palestine like Jenin and Tulkarm. It will take into consideration that geometric design and pavement surface evaluation will be applied on this road to improve its efficiency. Collect maps and data records of the area from Nablus Municipality including the main data and information available about the project. Estimate the LOS of the road.

Introduction Evaluation and analyzing the existing conditions of the road and predict any problems existence is a major task in order to provide the best solutions. This research aims to improve the operation, geometric, and pavement conditions for the mentioned road. The evaluation of pavement distress is an important part of the pavement management system by which a most effective strategy for maintenance and rehabilitation can be developed. The pavement condition of Haifa Street becomes unacceptable across time. Many of distresses are caused by deficiencies in construction, materials, and maintenance.

Introduction The gradual deterioration of a pavement occurs due to many factors including variation in climate, drainage, soil conditions, and truck traffic load. Different changes and modifications may happen during street life cycle, which lead to accumulated distresses and defects of pavement surface. So, knowledge of the various types of distress is important to pavement designers because it can help them to identify the causes of the distress.

Areal Photography

Methodology Reconnaissance visit and Data collection Data analysis Setting the design criteria

Data Collection Collecting data is very useful and essential for the project for assessment and redesign objectives. Visiting the road to evaluate the exist condition. Municipality of Nablus was visited to collect some data relative to the road such as alignment. In addition, collecting data about vehicles i.e. Traffic volumes Count. Several samples were taken from three different sites on the street to determine the CBR. Existing road conditions.

Level of Service For downgrade LOS=A For upgrade LOS=B After 20 years For downgrade LOS=C For upgrade LOS=E

Detailed Visual Inspection Visual inspection is very common way in evaluating the pavement. The rating method is based upon visual inspection of pavement distress. The rating method is a procedure by identifying and describing the severity and extent of pavement distress. The visual inspection helps the engineers to estimate the causes of distress (damage).

Detailed Visual Inspection Parameters to be Evaluated There are many factors to be evaluated, which include Alligator Cracking, Longitudinal Cracking, Transverse Cracking, Raveling, Patching, Block Cracking, Rutting, Depression, and Potholes.

Detailed Visual Inspection When rating distresses the adopted measures are as the followings: L = Light, M = Moderate, and S = Severe. Walking on the section and the sub sections.  The numbers 1 and 2 refers to light condition and small area or the percentage of the distress relatively to the subsection area.  The numbers 3 and 4 refers to a moderate condition, and medium area or the percentage of the distress relatively to the subsection area.  The number 5 refers to a sever condition and a large area or the percentage of the distress relatively to the subsection area.

Results

Pavement Evaluation and Remedial Actions There are several measures that can be made to deal with pavement, including:  Routine Maintenance: Those activities that are carried out as frequently as required during each year. It could be carried out several times per a year to ensure serviceability at all times and in all weathers such as road sweeping, crack sealing.  Extraordinary Maintenance: It includes activities that aim to return roads to their original condition when they have severely deteriorated. Typically, they involve road strengthing, by the application of one or more structural layers (overlays) to an existing pavement.

Pavement Evaluation and Remedial Actions  Crack Sealing: Placement of an asphalt sealing material in major cracks to prevent moisture from entering the pavement and causing potholes or street failure.  Pavement Overlay: Adding a new layer of hot-mix asphalt to the existing pavement reduces moisture content, improves skid resistance and restores pavement surface to like new condition.

Pavement Evaluation and Remedial Actions It could be concluded from the results that appear in the tables that the street needs to several actions as follows: 1. The section before Al-ain camp need to Routine Maintenance (Routine Patching & Crack Sealing). 2. The section at Al-ain camp need to Extraordinary Maintenance (Pavement Overlay). 3. The section after Al-ain camp need to Routine Maintenance (Routine Patching & Crack Sealing). 4. The section after Haifa-Tunis intersection does not need anything (Do Nothing).

Pavement Evaluation and Remedial Actions

Geometric Evaluation Horizontal Alignment A curve should normally be used whenever there is a change of direction in a road alignment and must be of sufficient length to avoid the appearance of a kink in the road alignment. The speed of road is 70 km/h, superelevation=2%, max side friction= 0.15 Rmin= (70)^2/127( )= m

Geometric Evaluation Turning Radius at intersection Considering that the design vehicle is bus (city transit bus) at intersections, the minimum radius according to (AASHTO) is 12.8m.

Geometric Evaluation

Note from the tables, some of turning radii not satisfying the standard that described in (AASHTO). Some radii need to re-design but others cannot be redesigned because of the presence of obstacles and buildings or they were meeting Specifications.

Geometric Evaluation Evaluation of Tapers  Storage length: The auxiliary lane should be sufficiently long to store the number of vehicles, likely to accumulate during a critical period.  Taper length: Long tapers approximate the path drivers follow when entering an auxiliary lane from a high-speed through lane.  Deceleration length: Provision for deceleration clear of the through-traffic lanes is a desirable objective on arterial roads and streets and should be incorporated into design, whenever practical.

Geometric Evaluation The full deceleration length = Taper Length + Deceleration Length At speed= 70 Km/hr The Full Deceleration Length=100m(AASHTO) Taper= 13:1(Long: Trans) Storage length= 10m X Median width= 3m X=39m = taper length The Deceleration Length= 61m

Conclusions and Recommendations Conclusions Haifa Street was suffering from most of pavement defects and deformations in variety cases and shapes in different areas. The most section suffers from defects and problems near Al- ain Camp. These problems in pavement occurs due to many factors such as repeating of high traffic volume due to heavy vehicles, changes in temperature through different climate of season varieties, poor drainage, problems in soil layers, Penetration of rainfall into base and sub-base layers. Some sections need for routine maintenance, the section near Al- Ain camp needs an overlay layer, and the last section does not need anything.

Conclusions and Recommendations After 20-year it is predicted that level of service will be lowered due to increment of traffic volume.

Conclusions and Recommendations Recommendations After twenty years, if there are no actions, then the level of service will be lowered and this mean lower efficiency for the road, higher travel time, congestion, and higher potential of traffic accidents. Therefore frequent inspections will be needed to re-design traffic conditions to enhance the performance for that road. Some sections need for routine maintenance, the section near Al- Ain camp needs an overlay layer, and the last section does not need anything.

THANK YOU