Jakarta, the capital city of Indonesia with population of 8.9 million in 2006, is one of the biggest cities in the world. Its metropolitan called “JABODETABEK” consists of Jakarta-Bogor- Depok-Tangerang-Bekasi which had 21.0 million populations in 2000 with a growth rate of 3.03% p.a. The increase of economic growth in Jakarta and surrounding cities is produced by the activities through trips from places of origin to destination and vice versa. Because the number of trips is increasing rapidly while the number of infrastructure especially road networks rises only slightly, it causes traffic congestions everywhere in the region. This happens all day long from morning till evening and gets worse during peak hours especially in Jakarta Inter Urban Toll Road (JIUT) as the major corridor. Based on the traffic survey in 2007, the average peak hour factor in the morning and in the evening for Jabodetabek area is around 8% from the daily traffic volume. The traffic forecast from 2002 to 2007 considered several factors such as vehicle’s ownership, number of population, employment and the gross regional domestic product. After that the traffic was distributed using the Furness method to achieve convergence. A transport model using CUBE VOYAGER was established to represent the actual traffic condition of Jabodetabek. Regarding the validation process, the deviation of the total average motorcycle volume from the CUBE VOYAGER model was compared with traffic counting survey is only 0.87%, passenger car 0.76%, and truck 4.42%. The total number of motorcycle and truck trips increases by 48% from the 2002 condition becoming 2,019,272 pcu and 843,127 pcu, while that of passenger car trips only raises by 32% into 4,369,820 pcu in 2007. To improve the traffic condition at the JIUT, several scenarios were selected in 2007 by increasing the toll tariff by 25% and 50% from the existing condition seemed to have slight effects on the route choice of toll road users. Apparently only 4.4% (10,123 pcu/hour) and 10.3% (9,496 pcu/hour) of toll road user would shift to non toll routes and only effectively increased speed 5.5% (23.2 km/hour) and 13% (24.85 km/hour). Implementing truck restriction is would likely drop the toll road users around 19.5% (8,520 pcu/hour) at the JIUT segment, while the average speed would increase by 30.6% (28.7 km/hour). By combining truck restriction and increasing tariff by 50% is would reduce toll road user by 34.8% (6,901pcu/hour) at the JIUT and at the same time, the average speed would increase by 43.6% (31.5 km/hour). The scenario for 2012 by increasing the tariff by 25% and 50% from the existing condition apparently would have significant effects on the route choice of toll road users. It seems that 9.2% (10,769 pcu/hour) and 17.2% (8,917 pcu/hour) of toll road users would shift to other routes and also increase speed by 11.5% (26.4 km/hour) and 22.2% (28.9 km/hour) respectively. Implementing truck restriction would reduce toll road users around 23.3% (8,260 pcu/hour) at the JIUT, while the average speed would increase by 29.9% (30.7 km/hour) respectively. By combining truck restriction and increasing tariff 50% would drop toll road users around 31.7% and raise the average speed by 48.9%. Adding 6 segment inner toll road at Jakarta would reduce the JIUT traffic volume by 9.1% (9,790 pcu/hour) and at the same time increase speed by 11.4% (26,4 km/hour) at the JIUT.

Kata Kunci : Congestion,Cube voyager,Tariff,Truck,Traffic volume,Speed