Number of Vehicle Type per State per Year1960-2005

Class ProjectMe/ENV 449, 2007

Fang-Yun ChouInstructor: R. Husar

Introduction

• ObjectObtain number of automobiles, buses, trucks and motorcycles in each state from 1960 to 2005.

• Source Federal Highway Administration

(http://www.fhwa.dot.gov/policy/ohpi/hss/hsspubsarc.htm)• Data

- Automobiles- Buses (Commercial Buses, School Buses)- Trucks (Truck Tractors, Farm Trucks, Pickups, Vans, Sport Utilities, Other Light)- Motorcycles

Results & Comparison (1) Number of Automobiles and Buses per Year

California

Number of automobiles kept increasing since 1960. Yet in 1993, it decreased. After the decrease, it has been increasing.

Missouri

Growth from 1960 has been unstable after 1971

California

The number largely increased in 1982. Overall, the number keeps increasing.

Missouri

Number of buses kept increasing since 1960. However, from 2000, it has slowly decreased.

Number of Automobiles per Year

05

101520

1,940 1,960 1,980 2,000 2,020

Mill

ions

Year

Num

ber o

fA

utom

obile

s

California Missouri

Number of Buses per Year

0

20

40

60

1,950 1,960 1,970 1,980 1,990 2,000 2,010

Thou

sand

s

Year

Num

ber

of B

uses

California Missouri

Results & Comparison (2) Number of Trucks and Motorcycles per Year

California

Large increase occurred in 1994 and 1996. In 1997, decrease was observed, Yet after that, the number has increased.

Missouri

Number of trucks was increasing from 1960. From 1997, small decrease and increase are observed.

California

Although the increase in number from 1960, it decreased from 1980 to 1998.

Missouri

From 1960 to 1974, the number is slowly increasing, however, after that, small decrease and increase are observed.

Number of Trucks per Year

0

5

10

15

1,940 1,960 1,980 2,000 2,020

Mill

ions

Year

Num

ber

of T

ruck

s

California Missouri

Number of Motorcycles

0200400600800

1,950 1,960 1,970 1,980 1,990 2,000 2,010Thou

sand

s

Year

Num

ber

ofM

otor

cycl

es

California Missouri

Conclusion Number of vehicle type

Automobiles > Trucks > Buses > Motorcycles Number of automobiles increases for all states until 1970. After

1970, The number in Missouri has been unstable. For California, except for the huge decrease in 1993, it has kept increasing.

In California, the number of buses is increasing. However, in Missouri, although the growth until 1999, it has decreased since 2000.

Other than decrease of number of trucks in California in 1997, growth of number is observed. In Missouri, after the growth until 1997, the growth is being unstable.

After 1980, number of motorcycles in California was decreasing until 1998. The number in Missouri has been unstable after its slow increase until 1974.