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For MGS side obstacle protection on a divided highway, what is your suggested practice for transitioning from standard post spacing to quarter post spacing?  Would you mirror the transition on the downstream side, even though this is a one-way situation?

Could you clarify the sentence highlighted below?  I'm having trouble following.  Also, how far upstream of the obstacle would you recommend the quarter-post spacing begin?

Thus, MwRSF has suggested that rail splices be configured to occur a minimum of 1 reduced span (3 ft - 1½-in.), and preferably 2 reduced spans (6 ft " 3in.), beyond the last or first MGS full-post spacing.

The quarter-post spacing MGS should begin a minimum longitudinal distance of approximately 12 ft " 6 in. in advance of the hazard.

In terms of rail splices locations, numerous rail splices occur at mid-span locations within the full-post spacing MGS. However, there will be a post where full-post spacing ends and half-post spacing begins. We are suggesting a preference to not locate a rail splice at this transition post. Instead, we would prefer that the first rail splice within the half-post spacing region occur either 1 or 2 posts away from where full-post spacing ends. I hope that this helps to clarify the issue.