The correlation between the city bus accessibility and transit ridership in Surabaya City, Indonesia

Suroboyo Bus and Trans Semanggi Suroboyo are public modes in Surabaya City, should be one way to serve city mobility in high number. However, the load factor of the city bus is below 50%. Therefore, it is necessary to evaluate the provision of public transportation, such as the city bus accessibility. This study uses the Public Transport Accessibility Levels (PTAL) method to analyze the city bus accessibility. The analysis result shows that most of the city bus accessibility levels are in the very poor category. This means that the city bus system could cover the city area at low level. Following that, the relationship between the accessibility level and the transit ridership is analyzed using correlation analysis. The results show that there are a significant correlation between the variable number of passengers and the bus stop accessibility index; frequency with the purpose of travel; accessibility index with the distance variable (distance of the departure stop from the origin location; distance of the destination stop to the destination location; distance traveled from the departure stop to the destination stop and total mileage); the frequency with the socioeconomic variables (age; average monthly income and driving license ownership). Based on these results, some recommendations are proposed to increase the accessibility level for influencing the demand of city bus.