Speed Management and Safe Crossing on Dhaka-Sylhet Highway (N2) in Bangladesh

Based on the reduction
in speed reduction
after construction, the
estimated reduction in
fatalities using Nilsson’s
<strong>and</strong> Elvik’s formula’s
combining two locations
combined, the average
estimated reduction
in fatalities is 59%
using Nilsson’s formula
<strong>and</strong> 60% using Elvik’s
formula ( Table 6.4 <strong>and</strong>
Figure 6.2 )
Figure 6.2: Relation of speed with crash reduction
Table 6.4: Estimated fatalities reduction using Nilsson’s (1982) <strong>and</strong>
Elvik’s (2009) formulas
Estimated reduction in fatalities Nilsson’s formula Elvik’s formula
Nilkuthi 57% 58%
Kunderpara 61% 62%
Average for 2 locations 59% 60%
6. 2 Crash reduction
The Crash data collected in all three locations during before construction period ranges
from June 1st 2013 to December 31st 2014 (19 months) <strong>and</strong> the after construction period
from May 1st 2015 to January 31st 2016 (9 months). Table 6.5 shows the total number of
crashes, injuries, <strong>and</strong> fatalities in the before <strong>and</strong> after periods. The numbers shown are the
combined totals for the 3 intervention locations.
Table 6.5: Number of crashes, injuries, <strong>and</strong> fatalities in before <strong>and</strong> af ter period
Total for period
(3 locations combined)
Before
(19 months)
Af ter
(9 months)
Number of crashes 175 28
Number of injuries 377 48
Number of fatalities 19 3
Analysis shows the fatalities in the before period in all three intervention locations, categorized
Report on <strong>Speed</strong> <strong>Management</strong> <strong>and</strong> <strong>Safe</strong> <strong>Crossing</strong> on Dhaka-Sylhet Highway (N2) in Bangladesh 38