1 Inter-Temporal and Inter-Regional Analysis of Household Car and Motorcycle Ownership Behaviours in Asian Big Cities Nobuhiro Sanko, Hiroaki Maesoba,

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1 Inter-Temporal and Inter-Regional Analysis of Household Car and Motorcycle Ownership Behaviours in Asian Big Cities Nobuhiro Sanko, Hiroaki Maesoba, Dilum Dissanayake Toshiyuki Yamamoto, and Takayuki Morikawa Nagoya University SAKURA Project July 2004

2 Economic Growth Income Increase INTRODUCTION Vehicle Ownership Increase

3 CASE STUDY CITIES We are HERE

4 CASE STUDY CITIES Nagoya, Japan (1981, 1991, 2001) Manila, Philippines (1996) Bangkok, Thailand (1995/96) Kuala Lumpur, Malaysia (1997)

5 Car Ownership in Case Study Cities (1960 ~ 1995)

6 Car Ownership Forecast around the World OECD U.S.A. Others Total (Yr) Increasing Trend in Developing Courtiers Number of Cars Owned (100 mln units)

7 INTRODUCTION Vehicle Ownership Increase  can cause traffic congestions and environmental problems Some Countermeasures Considered Investment in road infrastructure and public transit systems Regulations against vehicle ownership and usage Technical innovation in vehicle performance However, understanding vehicle ownership behaviours is the key and prerequisite.

8  Modelling and comparing vehicle ownership behaviours in the case study cities (Nagoya, Bangkok, Kuala Lumpur and Manila)  Obtaining insights into the effects of accessibility on vehicle ownership behaviours  Evaluating temporal and spatial transferability of vehicle ownership models OBJECTIVES

9 MODELLING FRAMEWORK Mode Choice Model Multinomial Logit Model (Trip Level) Trip makers’ SE LOS Vehicle Ownership Model Bivariate Ordered Probit Model (Household Level) Accessibility Measures Household members’ SE

10 MODELLING FRAMEWORK Comparing Vehicle Ownership Models and Evaluating their Transferability NGO81NGO91NGO01 BKK95 KL97 MNL96 Inter-temporal comparison and temporal transferability Inter-regional comparison and spatial transferability

11 CASE STUDY CITIES AND THE DATA Nagoya, Japan (1981, 1991, 2001) Manila, Philippines (1996) Bangkok, Thailand (1995/96) Kuala Lumpur, Malaysia (1997)

Area: 5656, 5173, 6696km 2 Population: 7.8, 8.1, 9.0 million Chukyo Metropolitan Area (Nagoya and Surrounding Areas) (1981, 1991, 2001)

13

14 Area: 7758 km 2 Population: 13 million Data Source: UTDM survey in 1995/96. N BMA Pathumthani Nonthaburi Nakorn Pathom Samut Sakorn Samut Prakarn Bangkok Metropolitan Region (BMR)

15

16 Data source: JICA survey in Klang Vally 243 km km 2 Area: 500 km 2 Population: 4.1 million Kuala Lumpur Metropolitan (KLMP)

17

18 Area: 636 km 2 Population: 14.4 million Data source: JICA survey in Metro Manila

19

20

21 Modal Splits in Case Study Cities

22 Car MC 90% Car MC NGO81 NGO91 NGO01 BKK95KL97MNL96 Car MC Car MC Car Vehicle Ownership Characteristics in Case Study Cities In NGO, household without car (-) and with 2+ cars (+)

23 LOS DATA Survey area is divided into zones Travel time: Average travel time reported by respondents (if no trip is made, larger zones are considered) Cost: Not available in all case study cities, thus not included in the model SOCIO-ECONOMIC DATA Driving license holding: Difficult to forecast and highly endogenous, thus not included in the model

24 MODELLING FRAMEWORK Vehicle Ownership Model Bivariate Ordered Probit Model (Household Level) Accessibility Measures Household members’ SE Mode Choice Model Multinomial Logit Model (Trip Level) Trip makers’ SE LOS

25 Estimation Results (Summary statistics) NGO81NGO91NGO01BKKKLMNL N15,000 13,882 12,66715,000 L ( ) -10, , , , , ,513.2 L (0) -15, , , , , , ,000 samples are drawn randomly in NGO and MNL Goodness of fit indexes are satisfactory

26 Estimation Results (alternative-specific constants and LOS) VariableNGO81NGO91NGO01BKKKLMNL Constant (R) Constant (B) Constant (C) Constant (MC) Time (60 min.) *-0.30 Four alternatives except for KL (Rail, Bus, Car, MotorCycle) Travel time is negatively estimated (not significant in KL) *Not significant at 5% level

27 Estimation Results (SE: Socio-Economic variables) Variable NGO81NGO91NGO01BKKKLMNL Male (C, MC) Age ≥ 20 (C, MC) In City (C) * Age ≥ 65 (B) Female (R) Student (R) Three SE variables have effects on car and motorcycle usage Male and age ≥ 20 (+) In City (  ), not significant in BKK Three SE variables have effects on transit usage Age ≥ 65 (+, bus) Female ( , rail) Student (+, in NGO; , in BKK and MNL, rail) *Not significant at 5% level

28 MODELLING FRAMEWORK Mode Choice Model Multinomial Logit Model (Trip Level) Trip makers’ SE LOS Vehicle Ownership Model Bivariate Ordered Probit Model (Household Level) Accessibility Measures Household members’ SE

29 ACCESSIBILITY Zone For individual residing in zone ( 1, …, ) Zone 1 … Zone Z Accessibility to Transit (Convenience of transit for those reside in zone ) Systematic component of the utility when individual uses rail and bus from zone to zone 1 respectively

30 ACCESSIBILITY For individual residing in zone ( 1, …, ) Additional Accessibility of Car and Motorcycle Availability Zone Zone 1 … Zone Z (Convenience of car and motorcycle if the individual can use these alternatives in addition to transit which is usually available to all citizens)

31 ACCESSIBILITY A potential drawback of “ accessibility to transit ” and “ Additional accessibility of car and motorcycle availability ” When the survey area is large, considering accessibility to all zones is questionable Weighted accessibility measures based on # of trips are considered.

32 ACCESSIBILITY Zone For individual residing in zone ( 1, …, ) Zone 1 … Zone Z Weighted Accessibility to Transit : importance of zone z for those reside in zone Traffic volume from zone to zone by rail and bus respectively

33 ACCESSIBILITY For individual residing in zone ( 1, …, ) Weighted Additional Accessibility of Car and Motorcycle Availability Zone Zone 1 … Zone Z

34 ACCESSIBILITY A potential drawback of weighted accessibility If people may travel to close and convenient zones only, then inconvenient but attractive zones may be excluded from the evaluation Anyway, we expect that the lower accessibility to transit and higher additional accessibility lead to car and motorcycle ownership intentions NGO81NGO91NGO01BKKKL Without weights Transit Addition With weights Transit Addition Accessibility measures considered (Not available due to the lack of zoning information) Manila is excluded since the model has not been estimated successfully.

35 MODELLING FRAMEWORK Mode Choice Model Multinomial Logit Model (Trip Level) Trip makers’ SE LOS Vehicle Ownership Model Bivariate Ordered Probit Model (Household Level) Accessibility Measures Household members’ SE

36 Propensity for Car Ownership if … VEHICLE OWNERSHIP MODEL Propensity for Motorcycle Ownership : observed # of car and motorcycle owned by household i : unknown parameter and threshold vectors to be estimated : error components standard bivariate normally distributed with correlation to be estimated Relationships these propensity functions with observations if …,,,,

37 Car MC VEHICLE OWNERSHIP MODEL Cars: 0, 1, 2 and 3+ MC ’ s: 0, 1 and 2+

38 EXPLANATORY VARIABLES USED Car OwnershipMotorcycle Ownership Accessibility # of males aged 20–65# of males aged 20–29 # of males aged –19, 66–# of males aged –19, 30– # of females aged 20–65# of females aged 20–29 # of females aged –19, 66–# of females aged –19, 30– # of workers # of motorcycles owned Correlation Accessibility Household members ’ characteristics Interaction Correlation License info. is not used: difficult to forecast in developing countries

39 CORRELATION AND INTERACTION We have confirmed that generally: Including error correlation significantly improves model fits Including interaction terms does not significantly improve model fits Models with error correlation (not interaction) are presented hereafter NGO81NGO91NGO01BKKKL Without weights Transit Addition With weights Transit Addition NGO81NGO91NGO01BKKKL Without weights Transit Addition With weights Transit Addition χ 2 1 (.05)=3.84

40 NGO81NGO91NGO01BKKKL Without weights Transit Addition With weights Transit Addition Accessibility measures considered ( based on L(0) and L(c) is reported) Not available ESTIMATION RESULTS As an example, the results using weighted additional accessibility of car and motorcycle availability are presented (the best fit to the data except for NGO 01 )

41 Estimation Results (summary statistics) NGO81NGO91NGO01BKKKL N1,000 L( )-1, , , , ,896.4 L(c)-1, , , , , ,000 samples are drawn randomly

42 Estimation Results (car ownership) Variable NGO81NGO91NGO01BKKKL Coef.t-stat.Coef.t-stat.Coef.t-stat.Coef.t-stat.Coef.t-stat. M M-19, F F-19, Worker Generally, household with more members has more cars # of workers have significant positive effects except for BKK Males aged have greater effects than females aged in developing countries and used to have in NGO Aged between have greater effects than aged -19,66- except for NGO81 females and BKK females

43 Estimation Results (motorcycle ownership) Variable NGO81NGO91NGO01BKKKL Coef.t-stat.Coef.t-stat.Coef.t-stat.Coef.t-stat.Coef.t-stat. M M-19, F F-19, Worker Household members’ characteristics estimated positively significantly or insignificantly except for females in KL More members, more motorcycles, generally # of workers have positive effects Males have greater effects Aged between have greater effects than aged -19,30- except for females in NGO01 and females in KL

44 Estimation Results (accessibility measures) Variable NGO81NGO91NGO01BKKKL Coef.t-stat.Coef.t-stat.Coef.t-stat.Coef.t-stat.Coef.t-stat. WAAC WAAMC WAAC estimated positively and significantly in NGO and BKK WAAMC estimated positively and significantly in BKK and used to be in NGO WAAC is estimated more significantly than WAAMC in NGO, suggesting that some own motorcycles for pleasure

45 Estimation Results (correlation) Variable NGO81NGO91NGO01BKKKL Coef.t-stat.Coef.t-stat.Coef.t-stat.Coef.t-stat.Coef.t-stat. Cor Positively estimated in NGO Positive unobserved interaction between car and motorcycle ownership Those who intend to own cars intend to own motorcycles, and vice versa Tend to become insignificant, that is, independent Negatively and significantly estimated in BKK and KL Negative unobserved interaction between car and motorcycle ownership Those who intend to own cars DO NOT intend to own motorcycles, and vice versa (substitution effect)

46 TEMPORAL TRANSFERABILITY NGO81NGO91NGO01 NGO01 vehicle ownership is predicted using NGO81 and NGO91 models

47 TEMPORAL TRANSFERABILITY (Forecast value – Actual value) is presented NGO81(W-T) NGO81(W-A) NGO81(T) NGO81(A) NGO91(W-T) NGO91(W-A) NGO91(T) NGO91(A) With weights Without weights TransitAdditionTransitAddition 91, without weights, additional is the best 51.5%36.6%48.6%28.6% 15.6%10.5%14.8%7.9%

48 SPATIAL TRANSFERABILITY NGO81NGO01 BKK95 KL97 BKK95 vehicle ownership is predicted using NGO81, NGO01 and KL97 models

49 SPATIAL TRANSFERABILITY (Forecast value – Actual value) is presented NGO81(W-T) NGO81(W-A) NGO01(W-T) NGO01(W-A) KL(W-T) KL(W-A) Transit Addition NGO81 and KL additional are better 50.1%99.0%175.3% 41.9%42.8%148.3%

50 CONCLUSIONS  This study analysed car and motorcycle ownership behaviours in Asian cities incorporating accessibility measures obtained through mode choice models.  Findings from the bivariate ordered probit models  More members, more vehicles  More workers, more vehicles  Males generally have greater effects on vehicle ownership  Aged between (car) and (motorcycle) have greater effects on vehicle ownership  Accessibility generally has significant impacts on vehicle ownership and has greater effects on car ownership  Correlation is estimated positively in NGO and negatively in developing countries

51 CONCLUSIONS  Findings from transferability analysis  Additional accessibility models have better transferability  Without weights accessibility models have better temporal transferability  Models estimated at the year closer to the target year have better temporal transferability  Models estimated at the area or time point that have similar characteristics to the target area have better spatial transferability