This preview has intentionally blurred sections. Sign up to view the full version.
View Full DocumentThis preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: the recommended design deceleration rate is 25% greater than the value used to develop Table 3.1, but due to the higher percentage of older people in the driving population, design reaction times have increased by 20% . Also, vehicles have become smaller so that the drivers eye height is assumed to be 3.0ft above the pavement and roadway objects are assumed to be 1.0ft above the pavement surface. Compute the difference in design curve lengths. Example 3 ECI 161 Winter 2012 4 A highway reconstruction project is being undertaken to reduce crash rates. The reconstruction involves a major realignment of the highway such that a 60 mph design speed is attained. At one point on the highway, an 800ft crest vertical curve exists. Measurements show that at 3+52 stations from the PVC, the vertical offset is 3ft. Assess the adequacy of this existing curve in light of the reconstruction design speed of 60mph. Example 4...
View
Full Document
 Winter '12
 Tafazzoli
 Rail transport, ECI, design speed

Click to edit the document details