Question A3 [25 marks] (a) [8 marks] Passengers have been complaining about the metro trains being overcrowded. As the metro company's management, you do not have any data to assess the situation. (i) [2 marks] What kind of data do you need in order to assess the situation? (ii) [4 marks] How can you obtain such data? If there are more than one methods available, suggest the most appropriate method with justification. (iii) [2 marks] What can you do for overcrowding the situation? Propose two solutions and comment from the transit operator's perspective. (b) [17 marks] Figure 1 below represents the transit network of a city consisting of buses (thick black lines) and a light rail line (thin black line) and information of the routes are given in Table 1 . The numbers next to each line is the travel time (in minutes) on that segment (e.g. the travel time from X to 2 is 25 minutes). Other useful information: - Bus fares are paid at boarding while the fare for light rail is calculated based on the segments the passenger travelled. - Bus and light rail: random arrivals, a=1 - Weight on waiting time and access time =2 - Value of time =$1 per minute (i) [12 marks] Solve the transit assignment problem for travelers who wish to travel from node X to node Y based on generalized travel time. (ii) [5 marks] If the passenger demand from X to Y in the morning is 800 , calculate the passenger volume on each route and the total revenue earned by the bus company and light rail company respectively. Figure 1. Transit Network in Question A3 Question A3 [25 marks] (a) [8 marks] Passengers have been complaining about the metro trains being overcrowded. As the metro company's management, you do not have any data to assess the situation. (i) [2 marks] What kind of data do you need in order to assess the situation? (ii) [4 marks] How can you obtain such data? If there are more than one methods available, suggest the most appropriate method with justification. (iii) [2 marks] What can you do for overcrowding the situation? Propose two solutions and comment from the transit operator's perspective. (b) [17 marks] Figure 1 below represents the transit network of a city consisting of buses (thick black lines) and a light rail line (thin black line) and information of the routes are given in Table 1 . The numbers next to each line is the travel time (in minutes) on that segment (e.g. the travel time from X to 2 is 25 minutes). Other useful information: - Bus fares are paid at boarding while the fare for light rail is calculated based on the segments the passenger travelled. - Bus and light rail: random arrivals, a=1 - Weight on waiting time and access time =2 - Value of time =$1 per minute (i) [12 marks] Solve the transit assignment problem for travelers who wish to travel from node X to node Y based on generalized travel time. (ii) [5 marks] If the passenger demand from X to Y in the morning is 800 , calculate the passenger volume on each route and the total revenue earned by the bus company and light rail company respectively. Figure 1. Transit Network in Question A3
