service=parking_aisle bridge on z16 has bridge casing rendered too prominent

[danieldegroot2]

Minor issue.; parking on a bridge is usually prohibited, so will be few if any valid cases.

Expected behavior

highway=service + service=parking_aisle + bridge=yes (or 'very narrow bridge') could be rendered as regular parking aisle way, or the black casing could be made less prominent. Knowing a parking aisle has a bridge is not too important at this zoom level, as opposed to regular service ways, which may have a more important function.

Actual behavior

It is rendered on z16 like

• a dam like this one
• a railway is rendered on z15 (heavy black line)

unless you really squint to see the 1px or so wide service way. Regular service ways require a bit less squinting.

Links and screenshots illustrating the problem

https://www.openstreetmap.org/#map=16/48.9910/8.3744 https://www.openstreetmap.org/way/371750307 (This example may be retagged as regular service way, there are no parking spots.)

Compare:

Dam

Railway

Regular parking aisle way

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Related: #3724, #4231

[imagico]

This is essentially the same problem as #3724 - just with a slightly different appearance without the access dashing. Any solution would probably apply to both.

One possible solution would be to render minor service road bridges at the width of normal service roads. However the appearance of minor non-bridge service roads at z16 is also not ideal.