Canberra Roads

[drsmith]

They could always copy Canberra and build a 1x1 lane freeway!
http://maps.google.com/maps?f=q&source= ... 18&iwloc=A

The interchange to the south (Glenloch Interchange) is an interesting creation. It does not cater for all possible movements and there's a bridge surplus to requirements.

http://www.tams.act.gov.au/__data/asset ... sheet7.jpg

Come to think of it the whole interchange looks surplus to requirements judging by the scale of the roads going into it.

[AtD]

The interchange to the south (Glenloch Interchange) is an interesting creation. It does not cater for all possible movements and there's a bridge surplus to requirements.

http://www.tams.act.gov.au/__data/asset ... sheet7.jpg

Come to think of it the whole interchange looks surplus to requirements judging by the scale of the roads going into it.

The only movements it doesn't cater for are not necessary as you'd be doubling back on yourself if you used them. The surplus bridge is from the previous interchange on site. TBH I think the interchange is excessive and has had too little thought put into it, which is true of most of Canberra's roads. It also has terrible and confusing signs. That's a rant for another thread...

[drwaddles]

The interchange to the south (Glenloch Interchange) is an interesting creation. It does not cater for all possible movements

It does cater for all movements?! (a u-turn does not count as a movement)

The pre-GDE Glenloch Interchange was even more bizarre with right-lane-exits that met at a signalised intersection. The plans I've seen from prior to it's construction all had a free-flowing interchange so I'd love to know how/why/when they lost the plot.

[drsmith]

With reference to the above map, how does a vehicle entering the interchange from the left (Caswell Drive) exit via William Hovell Drive ?

[drwaddles]

Don't know how I missed that - yeah you can't go from GDE southbound to William Hovell Drive.

[AtD]

Go via Bindubi St.

[drsmith]

A single bridge, two loop ramps and a two-phase traffic signal on the lesser of the two roads would have done the job without the need to go via Bindubi St.

[drwaddles]

There's very, very little demand for such a movement as William Hovell Drive passes through nothing but paddocks.

This may change when Molonglo is eventually built out (with the 'transit boulevard' linking to Bindubi Street) and then a connection may be considered desirable.

[drsmith]

There's very, very little demand for such a movement as William Hovell Drive passes through nothing but paddocks.

It would then be well suited to have been a signalised movement within the partial cloverleaf suggestion above.

My point was not that the above movement should necessarily be included as part of the interchange but that the interchange itself was gross overkill for what it does.