Agri-tek Volume 13 Nomor 1 Maret 2012 PENGARUH BEBAN.................. 66 PENGARUH BEBAN LALU LINTAS TERHADAP KERUSAKAN PADA JALAN RAYA NGAWI-CARUBAN Setiyo Daru Cahyono 1) 1) Dosen Fakultes teknik, Jurusan Teknik Sipil, Universitas Merdeka Madiun, Abstract: Roads are one of the supporting land transportation for the distribution of goods and services in meeting the economic needs of society. Ngawi-caruban highway is one of the national road which is always passed by vehicles from one city to another city and from one province to another province. As one of the national road the need for good road conditions so the vehicle can through smoothly. Ngawi-Caruban is located between Ngawi and Madiun that have a length of about 25 km. As a national road, highway-Caruban Ngawi always experience road pavement damage caused by vehicular traffic. Therefore there is need for research on how much influence between the traffic load and the damaged road. Stages of research include the calculation of traffic growth (LHR) in 2005 to 2010, survey the number of cargo vehicles that exceed the capacity of the vehicle based on data Widodaren bridges, pavement condition assessment using PCI (Pavement Condition Index) .From the results showed that the growth in traffic from 2005 to 2010 is 3.9.% (from Ngawi to Caruban) and 3.6% (from Caruban to Ngawi). Number of vehicles overloaded by an average of 33.52% per month. Excess charge per vehicle on average by 5% to 30% by weight of the excess charge per vehicle and a maximum of more than 90% of the weight of cargo per vehicle. PCI method of calculation is obtained by the condition of the road damage Fair. This study proves that the traffic load is very influential on the damaged road. And heavy cargo vehicles causing excessive load axis of the axle of each axis of the vehicle also exceeds the allowable axle load axis so that the axis of the axle load is distributed to the pavement causing excessive damage to the pavement. Keywords: Traffic Expenses, Road Damage, PCI PENDAHULUAN Untuk pemenuhan kebutuhan sarana transportasi barang dan jasa bagi masyarakat perlu adanya sarana transportasi yang baik. Salah satu sarana transportasi adalah jalan raya. Kondisi jalan raya yang baik berpengaruh terhadap kelancaran distribusi barang dan jasa. Jalan raya Ngawi-Caruban merupakan jalan raya yang menghubungkan antara Kabupaten Ngawi dan Kabupaten Madiun (wilayah Caruban). Kendaraan yang melewati Jalan raya Ngawi- caruban adalah kendaraan dari arah Surabaya menuju Solo atau sebaliknya dari Solo menuju Surabaya. Jalan raya iNgawi- Caruban mepunyai panjang kurang lebih 25 km dengan lebar jalan 12 m terdiri atas 2 lajur a jalur. Untuk struktur perkerasan jalan mengunakan perkerasan jalan aspal. Jenis jalannya adalah jalan nasional. Kendaraan yang melewatinya termasuk kendaraan berat. Kendaraan yang sering melawati jalan ini biasa mangangkut bahan kebutuhan pokok, material industri, bus antar kota antar provinsi yang langsung dari arah surabaya menuju solo atau sebaliknya dan kendaraan- kendaraan lainnya. Jalan raya Ngawi- Caruban sering mengalami kerusakan pada perkerasan jalan. Oleh kareperlu adanya penelitian yang meneliti tentang pengaruh dari beban lalu lintas terhadap kerusakan jalan. Dari analisa ini diharapkan adanya perbaikan – perbaikan yang sesuai baik secara