What is it about the winter logistics that keeps you from cycling? You need a route that has paths or roads suitable for biking, but this is not any different

What is it about the winter logistics that keeps you from cycling? You need a route that has paths or roads suitable for biking, but this is not any different from cycling in the summer. I switch to studded tires in November (http://www.peterwhitecycles.com/studdedtires.asp http://www.peterwhitecycles.com/studdedtires.asp) and wear clothing layers appropriate for the weather. My thermo tights are good down to 15 F or so depending on the wind. Below that I wear another bottom layer. One to four layers on top, warm windproof gloves, sometimes a balaclava, sometimes goggles. Below -5 F I usually drive. And when it has freshly snowed and the roads are a mess.