If you specify a negative scale, Oracle Database rounds the actual data to the specified number of places to the left of the decimal point. For example, specifying (7,-2) means Oracle Database rounds to the nearest hundredths, as shown in Table 26-1.
McCann (2000) found that households in communities with good transit use save an average of about $3,000 annually on transportation costs. Litman (2004) found annual transportation cost savings of about $1,300 per household in cities with well-established rail transit systems compared with cities that lack rail.
1 On average, bus rapid transit (BRT) costs $10.24 million in 1990 dollars per mile to build. 2  This figure is less than half that of that for light rail transit (LRT), $26.4 million and one-tenth of metro rail transit (MRT), $128.2 million.