Bridge condition split by ‘structure type’ showing the distribution of average BCI scores (BCI_ave) within each category of ‘structure type’ as percentages falling into the brackets of very poor, poor, fair, good and very good. Also shown are the average BCI_ave and BCI_crit scores for the bridges in each category, which have been weighted by the deck area of each bridge. These scores are on a scale from 0 to 100. The width of the bars has been scaled by the number of bridges in each category