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Thanks guys. On the exam, if asked for SSD on a VC, I will use the L equations from the AASHTO GB solving for S and if asked for a posted speed given L and grades, I will use those same equations to solve for S and compare those S values with the level roadway values (using the appropriate Sag/Crest) tables to determine a speed limit. But if asked for the length of a vertical curve, using the K value method I will use the K=LA equation, utilizing the design K values. If asked for a length without the problem specifying using the K value method, I will go back and use the L equations. Does that all sound correct?
Thanks guys. On the exam, if asked for SSD on a VC, I will use the L equations from the AASHTO GB solving for S and if asked for a posted speed given L and grades, I will use those same equations to solve for S and compare those S values with the level roadway values (using the appropriate Sag/Crest) tables to determine a speed limit.
But if asked for the length of a vertical curve, using the K value method I will use the K=LA equation, utilizing the design K values. If asked for a length without the problem specifying using the K value method, I will go back and use the L equations.
Does that all sound correct?
