Summer bike
Direct route: 12km (7.5 miles)
Average speed: 22-26kph (14-16mph) [Record is 26.7kph]
Cruising speed:30-35kph (19-22mph)
To work: 44 traffic lights + 2 stop signs
To home: 46 traffic lights + 1 stop signs

Winter bike
Direct route: 13km (8.1 miles)
Average speed: 15-18kph (9-11mph)
Cruising speed: 20-25kph (12-16mph)
To work: 39 traffic lights + 7 stop signs
To home: 40 traffic lights + 7 stop signs

The ride is usually faster to work then back.
It is very urban. I replace tires and brake pads quite often.
On the plus side, my acceleration from a dead stop is quite good.