OBJECTIVE Blood alcohol concentration (BAC) was digitally determined for transport operators, passengers, and pedestrians in a southern Nigeria city. METHODS The subjects were screened with a digital breathalyzer, Alco Scan CA 2000, for BAC along major accident-prone highways, resting spots, and hospitals. The mouthpieces were complemented with disposable straws for rapid and hygienic screeni...

This chapter focuses on one aspect of economic growth: the post-construction effect of interstate highways on income and sales expansion. Using data for all Nebraska and Iowa counties, interstate highways are found to have the most positive economic impact on areas with larger populations; small areas are not likely to experience much more than short-term gains. This finding has significant imp...

We examine the relationship between large infrastructure spending, of the type implied by interstate highway construction, and the level of economic activity. By collecting historical data on interstate highway construction and economic activity in the United States at the county level we find that highways have a differential impact across industries: certain industries grow as a result of red...

The objective of the Interconnecting Highways problem is to construct roads of minimum total length to interconnect n given highways under the constraint that the roads can intersect each highway only at one point in a designated interval which is a line segment. We present a polynomial time approximation scheme for this problem by applying Arora’s framework in [2]. For every fixed c > 1 and gi...

Slope ecological protection technology is a form of slope with high ornamental and good economic value. At present, it widely used in highways urban streets’ works. However, its use not very common mountain tourism highways; hence, necessary to implement strategies for highway design promote excellent development.

Nearly 18 years after the Government of Nigeria dismantled toll plazas along country’s highways, there is renewed interest by present administration to re-introduce roads help finance construction, repairs and maintenance highways. This has been met with predictable opposition from different groups around country. paper notes that using tolls as a means financing highways not particularly bad s...