i am not sure, but i think you can increse the time by setting the same stop a second time in the list so tthe time will be added. like this:
stop 1 200s
stop 1 100s
will result in stop 1 300s

Unoccupied cars leave map maker that cant be removed while driving. I tried to remove them by removing the car that made them and by driving over the exact same spot, both unsuccessful.
Some copper as seen in game...
http://i.imgur.com/MTmk4B2.jpg
... and on the map
http://i.imgur.com/zuJ9IW3.jpg ...

Moved due to obvious reasons from balancing board -- ssilk

As a diligent user of land mines i am always annoyed by the "building lost" warnings everytime i got attacked, because i lost some with the only purpose of blowing up. I would like too see a notification like "turrets engaging with enemy ...

1.)
I would like to see a underground layer to give underground belts more possibilities than a straight 4 block line.
more layers would hurt the gameplay more than to improve it (if you dont plan your flow of resources, just go deeper)
2.)
in my opinion completely unnecessary. Your job is to ...

... when you try to fuel your car with some spare logs.