11-10-2017, 09:57 AM
Then how can OD be improved? What else can be done to reduce the risk? How could Part 2 then be answered?
The exams wants to show understanding of principals. To select the most costly and complex solution first off shows little knowledge and screws the rest of the question. An AHB could be selected based on a detailed risk assessment and initially selected by stating any assumptions to support its selection.
Don't assume a school or a higher line speed is a high risk. With OD, what is the level crossing has an excessive hump in the middle? Then there is the additional implementation, maintenance costs, additional spares... all when an AHB may have been perfectly acceptable with additional measures.
The exams wants to show understanding of principals. To select the most costly and complex solution first off shows little knowledge and screws the rest of the question. An AHB could be selected based on a detailed risk assessment and initially selected by stating any assumptions to support its selection.
Don't assume a school or a higher line speed is a high risk. With OD, what is the level crossing has an excessive hump in the middle? Then there is the additional implementation, maintenance costs, additional spares... all when an AHB may have been perfectly acceptable with additional measures.
Le coureur