Overall, the Portugal's data was the dominant throughout the years while UK was the lowest. The downward trend can be seen in Italia, Portugal and UK, however, the opposite was true for USA.

In 1990, the government investment in Portugal was around 27% which occupied the highest position before decreasing gradually and reaching exactly 20% in 2005. However, opposite to Portugal, the upward trend appeared in USA. Starting at 10% in 1990, though its figure slightly went down to around 8 in 1995, it increased considerably in 2000 and then keeping going up to 15% in 2005.

Regarding to other countries, Italia and UK shared a same downward trend but the Italia still had higher number than UK. In 1990, Italia and UK started with around 23% and 10% and then both countries had a significant fluctuation in the next two years. Eventually, two countries ended up with falling to under 20% and 7% respectively.

Generally, the proportion of government investing in roads and transport in Portugal came out first in 4 years while the opposite was true for the UK. Most countries experienced the downward trend, except for the USA.

In 1990, Portugal recorded the highest percentage of government spending on roads and transport, reaching at approximately 27%; in the later years, It declined slightly by around 4% in 2005. In Italia, the figure witnessed the downward trend, starting at around 22% in 1990, then that proportion increased gradually from 20% in 1995 to nearly 25% in 2000. However, it finally dropped to 19% by 2005.

On the other hand, the UK and the USA experienced the different trend in expenditure. The figure of UK maintained the low-level on roads and transport through years, beginning at 10% in 1990, this figure rose gradually to 12% in 2000 and then decreased to 7% in the last year. Meanwhile, the USA witnessed the upward trend, starting at 11% in 1990 and climbing considerably to 15% by 2005.

Overall, while Italia and UK witnessed a fluctuated trend in the spending rate on transportation and roadway, the opposite was true for those in Portugal and USA. It can also be seen that there was a highest amount of Portugal's investment.

In 1990, around 22% spending in Italia were on transport facilities. This figure continued to climb sightly in 2000, at just over 2% after falling down exactly 20% in 1995 and finally decreased under 20% in 2005. Starting at 10% investment in 1990, the rate of government expenditures invested by UK, which fluctuated between under 10% and around 12% in 1995 and 2000 respectively, fell moderately to 7% after 15 years.

However, the opposite trend can be seen in other countries' figures. Between 1990 and 2005, there was a steadily decline in the percentage of Portuguese government investment, from above 25% to 20%. USA experienced a gradual rise of under 5% over the years, approximately 11% in 1990 then increased to 15% in 2005.

In general, it is clear that the data of Portugal spent predominantly much more money than others while the UK was the lowest figures throughout the years.

In 1990, Portugal allocated the highest share of its budget for road and transport , at arround 27%,followed by Italy with 22%,The USA and the UK spent less, at roughly 11% and 10% respectively.By 1995, the percentages in Portugal and Italy had fallen slightly, to 24% and 20%. In contrast, the UK’s spending remained almost unchanged, while the USA’s figure experienced a small drop to around 10%.

From 2000,although Italia and UK had fluctuate but after that Portugal and them still declined until 2005. In contrast, the USA saw a gradual rise over the period, increasing from around 11% in 1990 to 15% in 2005 .

Overall, governments in European countries, namely Italy and Portugal, spent more money on roads and transport than the UK and the USA. It is also clear that spending decreased in most countries, except in the USA where it went up slightly over the period.

In 1990, Portugal had the highest figure at around 27%, followed by Italy with about 22%. In contrast, the UK and the USA both spent around 10–11% of their government budgets on roads and transport. Five years later, spending in all four countries dropped slightly by about 1–3%.

By 2000, Italy overtook Portugal, rising to around 23% while Portugal’s spending continued to fall to 22%. The UK increased slightly to 12%, and the USA to about 14%. In 2005, the figure for the USA continued to rise to 15%, while the other three countries saw declines, reaching 19% for Italy, 20% for Portugal and 8% for the UK.

In general, government expenditure on roads and transport decreased in most countries over the period, except in the USA, where the figures gradually rose. Portugal consistently allocated the highest proportion of its budget, while the UK spent the least throughout the years

In 1990, Portugal led with about 27%, followed by Italy at just over 20%. The UK and the USA spent much less, around 10% and 11%, respectively. Over the next decade, Italy’s figure climbed slightly to its peak in 1995 before falling continuously afterwards. Similarly, Portugal saw a gradual decline after 1995, dropping to about 21% by 2005

From 2000 to 2005, there was a clear downward trend in Portugal and Italy, both declining by roughly 5%. In contrast, the USA showed a steady increase in investment, reaching around 15% in 2005. The UK experienced a minor fluctuation, with spending falling to 9% in 1995 before recovering slightly to about 12% by 2005.

overall,it can be seen that while italia,potugal and UK experienced a downward trend in the rate of road and transport,the opposite was true for USA

In 1990,portugal reached the highest rate of government spending on road and transport then drop gradually and reach 20% in 2005,however,opposite to portugal the upward trend is own by USA,begining at 10% in 1990 in 1995 its went down to 8% then increased sharply in 2000 and reach 15% in 2005.

In contrast to Italy, where spending was relatively high, the figure for the UK was much lower throughout the period. In Italy, government spending on roads and transport started at about 22% in 1990, slightly increased to around 24% in 1995, but then fell gradually to 19% by 2005. Meanwhile, in the UK, the percentage remained much smaller, at only around 10% in 1990 and 1995. It then rose modestly to about 13% in 2000 before dropping again in the final year. Overall, while Italy experienced a downward trend after a small rise, the UK’s figure stayed comparatively low with minor fluctuations.

In the year 2000, Italy's spending increased to 23%, surpassing Portugal's which fell to 22%. Spending in the UK and the USA also rose to 12% and 17%. Finally, in 2005, only the USA maintained its spending at around 15%, while the other countries' spending fell. The UK recorded the most significant decrease, with spending at only about 8%, making it the lowest among the four countries.