Capacity Analysis of Vehicle Parking Area in " Terminal Petikemas Surabaya "

Parking is one element of the means that cannot be separated from the overall road transportation system. Parking is a problem that is often found in urban transportation systems both in big cities and in developing cities. The reality that often occurs is that the condition of vehicle parking, including the misuse of the function of the parking space, improper and inadequate arrangement of facility layouts, causes undisciplined vehicle users. To determine parking facilities at a location, a good standard parking requirement is needed so that the parking space provided can accommodate the parked vehicle according to its purpose. This study is located at PT. Surabaya Petikemas Terminal, Perak Barat, Krembangan District, Surabaya City, East Java. The method applied in this study is to conduct a direct survey in the field including recording vehicles entering and leaving to get vehicle data. From vehicle data an analysis is carried out to obtain the parking volume, accumulation, duration, parking capacity, parking availability, and parking turnover rate and parking index. The results of the analysis obtained parking characteristics for 2-wheeled vehicles have the highest parking volume in a row of 454 vehicles, the duration of parking vehicles ranges from 2-3.5 hours. The highest parking accumulation is 132 vehicles / hour, the highest parking capacity is 45 vehicles / hour, the highest parking availability is 403/10 hours, the highest parking turnover rate is 0.42 / plot / hour, and the parking index is 97.7%. Judging from the characteristics of parking,


Preliminary
PT. Surabaya Container Terminal or abbreviated as PT. TPS is a subsidiary of PT. Pelabuhan Indonesia III or PT. PELINDO III (Persero). PT. TPS provides export-import and domestic container terminal services. PT. TPS runs its core business as a container terminal operator, is an economic gateway to export-import and domestic activities in Eastern Indonesia and is the first terminal in Indonesia to implement ship safety standards and port facilities that have been in place since July 2004. Along with the development of world trade by sea, the demand for sea transportation from year to year has increased rapidly. This causes the number of service users to increase and is directly proportional to the increase in the addition of facilities around the area of PT. TPS, According to Traffic and Transportation (2009), parking is a place to stop a vehicle or load and unload goods for a long or short period depending on the conditions and needs while according to Abu bakar (1996) , parking is a state of immobility of a vehicle that is temporary. So parking can be interpreted as a condition of not moving a vehicle that is temporary because it was abandoned by the driver. Determination of location and construction of parking facilities for the public, carried out with due regard to the regional spatial plans, traffic safety and smoothness, environmental preservation, and ease of service user morning. the implementation of public parking facilities is carried out by the government, legal entities or citizens. In the parking area of PT. Surabaya Container Terminal specifically for two-wheeled vehicles is still being evaluated because at certain hours with an average of 345 vehicles coming in and out of the two-wheeled vehicles and the area is always full and without supervision from officers or security to ensure vehicles are parked regularly, the consequences are still there vehicles parked carelessly in certain areas, so that in certain areas there are vehicles that are trapped and cannot get out. Seeing such reasons, an analysis of the capacity of the parking area at PT. Surabaya Container Terminal. ADRI INTERNATIONAL JOURNAL OF CIVIL ENGINEERING VOLUME 5 │ NUMBER 2 │ AUGUST 2020 Available online at http://proceedings.worldconference.id.

Literature Review
According to suwardi (2007) the planning of a parking facility must be based on the revival rates in accordance with the conditions of each area so that it will provide good planning results. This is related to the land use and planning of an area so that the planning, arrangement and management that is applied must be able to anticipate parking demand for now and in the future.
According to Suthayana (2010) both the standard parking space requirements calculated based on the average parking accumulation and the maximum parking accumulation both have weaknesses so that in determining the standard parking space requirements must be more careful.
Meanwhile, according to Hobbs (1995) determining the standard parking space requirements must be able to know the characteristics of parking. Parking characteristics are intended as basic properties that provide an assessment of parking services and parking problems that occur.

Research Methods
The steps of this research will be carried out as the following flow chart:

Research Result
The available parking area is obtained from the database of PT. TPS. Parking area data for 2-wheeled vehicles has a parking area of 730 m2 with a total parking lot of 210 parking lots. The division of parking spaces is divided into 2 parts, namely the front of 135 parking lots and the back of 75 parking lots. Observation data at the study location, then processed and analyzed according to the formulation of the problem in the study, namely the characteristics of vehicle parking at PT. TPS includes: parking volume, parking accumulation, parking duration, parking capacity, parking index and parking turnover rate.

Parking Volume
Parking volume is the number of vehicles parked at the study location during a certain time period, in this case the calculation is grouped at every 1 hour. Furthermore, an analysis of survey data was conducted to obtain the parking volume at the study location for 10 hours of observation as shown in the following

Parking Accumulation
Parking accumulation is strongly influenced by the number of vehicles entering and leaving the parking area at a certain time period. If more vehicles enter the parking area while fewer exit, the accumulation value will be large. The survey is used in 1 hour for 10 hours starting at 07.00 until 12.00 and at 13.00 until 17.00 WIB.

Parking Duration
Based on the results of the above study it was found that the average parking duration of 2 to ± 4 hours with a time interval of 30 minutes, can be seen in the following table: The highest parking duration is at 221.7 minutes. Parking users occupy the parking space for more than 3 hours.

Parking Index
From the survey data and the calculation that has been done, we can find the provision of parking for each study day as in the following table:

Parking Replacement Level
Parking turnover rate shows the level of parking space usage which is obtained by dividing the total number of vehicles parked during a certain period of time from a survey conducted by the number of parking lots available The level of parking change obtained for 3 days of observation of the average front vehicle was 1.01 vehicles / plot / hour, while for the rear it was 0.89 vehicles / plot / hour. The highest parking turnover occurred on Monday as many as 0.40 vehicles / plot / hour. ADRI INTERNATIONAL JOURNAL OF CIVIL ENGINEERING VOLUME 5 │ NUMBER 2 │ AUGUST 2020 Available online at http://proceedings.worldconference.id. ISSN: 2656ISSN: -1174 36 SRP needs at the front of the parking area is 165 SRP, while the available parking space at the front is 135 SRP, so the SRP shortage is based on an analysis of the needs of 30 SRP parking spaces at the front. The need for parking space in the rear is 95 SRP, while the available parking space is 75 SRP, so the shortage of SRP is based on an analysis of the demand for parking space of 20 SRP in the back.

Description Of Parking Needs For The Week Ahead
To find out the increase in the number of parking space requirements is to multiply between the average number of vehicles by week for 3 months. Then the calculation is taken with the assumption that the addition of vehicles every week is taken on average the number of vehicles for 3 days of observation using the existing conditions.

Figure 3. Description Of Parking Needs For The Week Ahead
Based on the graph above, it can be seen the need for parking spaces every week continues to increase by 7% both at the front and at the back of the parking area of PT. Surabaya Container Terminal with a total of 5920 vehicles.