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Scheme for Bridge and Road Approaches

Scheme for Bridge and Road Approaches

Scheme for Bridge and Road Approaches

(OP)
We have this problem for the scheme of the bridge, to get the optimal length and height.

I have some clarifications on the allowable/standards/usual guidelines in the design.

1. What is the maximum grade/slope for road approaching the bridge? (excluding the approach slab and additional minimum vertical curve after/before the approach slab) Is it 7%? or 12%? This is for mountainous areas.

2. What is the optimal span/length of bridge for this situation? (Just an approximation)

Attached is the profile of road approach with the river cross section

TIA!

Very Truly Yours,

- andru18

RE: Scheme for Bridge and Road Approaches

There's no attachment.

The maximum grade is a function of the roadway type, geometry, vehicle type etc; for example, in NY, the maximum grade for interstate highways is limited to 5%.

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