Analysis of the Level of Road Damage Due to Vehicle Volume on Rigid Perkerasa on the Pantura Tegal-Pemalang Road in Tegal Regency

Tegal Regency is a regency located in the northwestern part of Central Java Province. Tegal Regency has a strategic location on the road Semarang Tegal Cirebon, and Semarang Tegal Purwokerto and Cilacap. With this strategic location, Tegal Regency is crossed by the Pantura Main Line, and also has a main crossing from the north coast to the north coast . That makes Tegal Regency have started to develop in a number of industries and economies. With this development, the flow of vehicles, especially vehicles that have a large tonnage , will also increase. This causes many roads to be damaged because they exceed the load capacity of the previously constructed plan. The road network is also a land transportation infrastructure that plays a very important role in the transportation sector for the distribution of goods and services, so a good road pavement design is a must.


INTRODUCTION
Tegal Regency is a regency located in the northwestern part of Central Java Province. Tegal Regency has a strategic location on the road Semarang -Tegal -Cirebon, and Semarang -Tegal -Purwokerto and Cilacap. With this strategic location, Tegal Regency is crossed by the Pantura Main Line, and also has a main crossing from the north coast to the north coast . That makes Tegal Regency have started to develop in a number of industries and economies. With this development, the flow of vehicles, especially vehicles that have a large tonnage , will also increase. This causes many roads to be damaged because they exceed the load capacity of the previously constructed plan. The road network is also a land transportation infrastructure that plays a very important role in the transportation sector for the distribution of goods and services, so a good road pavement design is a must.
With the population increasing every year and the increasing number of vehicles, the need for road -transportation facilities is very large. Therefore, optimal road construction planning and technical requirements are needed . according to function, volume and nature of traffic so that the construction can be of maximum use for the development of the surrounding area. Road construction planning without adequate road maintenance, both routine and periodic, will be able to cause substantial damage to the road, so that the road will lose its function faster. Road damage that occurs in various regions today is a very complex problem and the losses suffered are really big, especially for road users, such as the occurrence of long travel times, congestion, traffic accidents , and others. These individual losses will be the accumulation of global economic losses for the area .
Basically the road will experience a decrease in its structural function in accordance with increasing age. Roads are currently experiencing damage in a relatively very short time (early damage) both newly built roads and newly restored roads (overlay).

ARTICLE HISTORY
Received: 10 May 2019 Revised: 13 June2019 Accepted: 12 July 2019 ABSTRACT Traffic volume is one of the factors causing road damage. Rigid pavement is generally used on roads that have fairly heavy traffic. With the increasing number of vehicles it is possible that the road will suffer damage in a relatively short time .The purpose of this study was to determine the effect of the volume of vehicle types with the level of road damage and the relationship of the volume of vehicle types with the level of road damage on rigid pavement. So it can be predicted in advance the value of road damage that will occur. The method used in this research is the method of analyzing vehicle volume and the level of road damage using the regression method. Namely to get the function of the relationship with the value of R ² (coefficient of determination) which shows the magnitude of the effect of changes in the variation of the volume of vehicle types to changes in the value of road damage. This research was conducted in the Pantura Tegal -Pemalang Lane section . There is a relationship between the volume of vehicle types and the value of road damage. With the result R² = 0, 892 show k of damage roads that influenced the volume type of light vehicles and heavy vehicles have a percentage of 8 9.2 %. With the results of the heavy vehicle equation (X2) and the value of road damage (Y) that is Y = 0, 27 X2 + 8 , 887 . From this equation can be described as follows .. Regression coefficient X2 ( a ) = 0 , 27 , meaning that heavy vehicles by 100 vehicles / day will increase the level of road damage by 27 , constant (c) = If no vehicles pass a road , the road will suffer a road damage of 8 , 887.

Road Damage; Rigid Pavement; Vehicle Volume;
Cement concrete road or rigid pavement consists of slabs and concrete foundation layers. Pavement is generally used on roads that have fairly heavy traffic, with the increasing number of vehicles it is possible that the road will suffer damage in a relatively short time. But if the rigid pavement is maintained properly and remains in good condition then the cement concrete road will have a longer life. But once this cement concrete road is damaged, the damage will take place very quickly. Therefore it is very important to carry out preventative maintenance. Assuming the background above, I took the title of this thesis writing, "Analysis of the Level of Road Damage Due to the Volume of the Vehicle on Rigid Pavement in the Tegal -Pemalang Pantura Line".

METHOD
Meto de research is the work demands that they meet the objectives of research studies that have been determined. Another understanding of methodology is a process, principles, procedures in approaching problems and efforts to find answers. Methodology can also be interpreted as a systematic study in a qualitative or quantitative manner with various methods and techniques. This method can be in the form of scientific analysis, namely qualitative descriptive analysis and quantitative analysis.
According to Sugiyono (2010) explains that research methods are scientific ways to obtain valid data, with the aim to be found, developed and proven, a certain knowledge so that in turn it can be used to understand, solve, and anticipate problems. The research method is basically a scientific way to collect data with specific purposes and uses. The scientific way means that research activities are based on scientific characteristics, namely rational, empirical and systematic.

Data source
a. Primary data Traffic Volume Data. This data is taken only during peak hours, based on vehicle volume data from the Tegal city transportation office. Because the initial traffic volume data is obtained through secondary data (MKJI: 1997).

b. Road Damage Data
This data is taken by measuring and calculating the level of damage to the road under study.

a. Road Inventory Data
This data was obtained from the Tegal Regency Bina Marga Office. Data needed includes the length and width of the road, the number of sections, the median, the number of lane roads and completeness. b. Traffic Volume Data Traffic volume data was obtained from the Tegal Regency Transportation Office. This data includes data on the volume of vehicles passing the road per hour. This data is not used for research analysis but rather is used as a reference for primary data collection that is carried out in peak hours (MKJI: 1997).

Analysis Method
The analytical method used is: a. Method of analysis of vehicle volume and value of Damage in general.
b. Regression analysis method to get the relationship pattern of vehicle volume with the level of road damage   After Np is obtained to find the damage value (Nq), it remains to be multiplied by the value of the amount of damage (Nj). For the Nj value itself, there is a choice of values based on the type of damage available, the following values are: If the value of Np and the value of Nj have been multiplied, then the value can be used to find the value of the amount of road damage (Nq). The method can be classified in the following table.  From the results of the analysis show the type of vehicle is quite influential on road damage. R2 is indicated by the results of determination coefficient of 89 , 2 %. This indicates that the type of vehicle and affect the level of damage to roads amounted to 89 , 2 %.

V olume ago Linta
Regression analysis was carried out to get the results of the heavy vehicle equation (X2) and the value of road damage (Y), namely Y = 0, 27 X2 + 8 , 887 . From this equation can be described as follows. Regression coefficient X2 (a) = 0, 27 , meaning that a heavy vehicle of 100 vehicles / day will increase the level of road damage by 27 , constant (c) = If no vehicle crosses a road, the road will experience road damage of 8 , 887.

CONCLUSION
There is a relationship between the volume of vehicle types and the value of road damage. With the results R ² = 0, 892 with the results of the equation of heavy vehicles (X2) and the value of road damage (Y) is Y = 0, 27 X2 + 8,887 . From this equation can be described as follows.
Coefficient X2 ( a ) = 0, 27 , meaning that a heavy vehicle of 100 vehicles / day will increase the level of road damage by 27 , constant (c) = If no vehicle crosses a road, the road will experience road damage of 8 , 887 . The pattern of the relationship is a k of damage path that influenced the volume type of light vehicles and heavy vehicles have a percentage of 89 , 2 %.