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Global upgrade

Do you love transport fever but get annoyed by the tedium of having to upgrade segment by segment when electric track or high speed track arrives? What about bridges, that had to be destroyed and rebuilt? If so then this is for you:
-Upgrade streets, from any type to any (available type)
-Upgrade tracks to both electric and/or highspeed with one button
-Upgrade tram tracks to electric, to include a bus lane, and to any of your choosing
-Upgrade BRIDGES!!!!
-Upgrade city connections with straighter roads and even automatically add new ones for poorly connected city
Additional features:
-Upgrades can be performed "globally" or within a view circle (you'll understand when you try it).
-There is an abort button to gracefully end upgrades in progress
-Sometimes upgrade is not possible, e.g. widening a street, a report tells you how many segments have failed
-Upgrades are batched, if a batch fails it is retried segment by segment
Warnings and limitations:
-Aside from vanilla stations, this will not upgrade anything within buildings (as it causes a crash). Modded stations and other mod structures (e.g. compact tunnel entrance) will not be upgraded by this mod
-I have experienced many many crashes getting this to work. I think they are all solved but (auto) save frequently especially before a big global upgrade!

Update notes 1.1:
-Improvements to performance and stability
-Added features:
--Upgrade sigals to the current era
--Upgrade station buildings to the current era
-City connections!
--Straighten out the country roads built initially
--Experimental, build new city connections, this is going some way to replace the original street generator which I find a bit too curly

Update notes 1.2:
-Fix issue with signal upgrades giving the wrong type for 2 way vs 1 way
-Added feature to allow general purpose track upgrades (should allow upgrading to modded track types)

Update notes 1.3:
-Fix issue with sizing of icons
-Added feature to allow modification of player ownership for street upgrades

Update notes 1.4:
-Added feature to allow segment-wise selection for upgrade
-Allow for specification of tram / bus upgrade during street upgrade
-Add a button to allow train paths to be reset