Question about using hidden linetypes

[DVE48]

I have a question about when hidden linetypes should be used on civil drawings related to utility installation. If you were preparing plans for an underground utility to be installed along a street (as shown in red on the attached image) that goes under a bridge above, would you show the bridge above on a hidden linetype or the street below the bridge on a hidden linetype?

 

[CarlB]

You could show it either way, as long as it's well identified which is which. I'd think the road below is more pertinent to the utility installation, so would show the bridge above with less dominant linework, either hidden/dashed, or faded.

 

[BridgeSmith]

As CarlB, noted, it should show what's pertinent to the utility installation. If the installation method doesn't require overhead clearance to be accomplished, then probably the only parts of the bridge that needs to be shown would be those below ground.

 

[DVE48]

Thank you both! I agree with both of you but most of my coworkers don't.

 

[udraft]

In the civil world, a hashed line can indicate a hidden or an existing feature. It should be clear on the documents which is intended.
In either case the roadway under the bridge would be dashed or omitted.

 

[DVE48]

In the civil world, a hashed line can indicate a hidden or an existing feature. It should be clear on the documents which is intended.
In either case the roadway under the bridge would be dashed or omitted.

Even if the work being done is for the road underneath, you would still show the road underneath as being hidden?