On my bike commutes I was seeing a moderately tall, bearded young man walking toward Wolfeboro along Route 28. Usually I would see him somewhere along the north slope between Route 171 and the crossroads at North Wolfeboro Road and Pork Hill Road, but it might be further north before 171 or a little further along, past North Wolfeboro. It took me a while to notice that he was walking all the way into the town of Wolfeboro and walking to various destinations while he was there. If he also walked back out the way he came in, he had to be logging well over 20 miles a day on foot.
I never saw him hitching a ride. He walked on the correct side, facing traffic. I can't recall if I ever saw him walking back northward toward Ossipee, but I might have forgotten it. Whether you see someone along a route depends entirely on your schedules. Our mornings coincided regularly. In bike season I might be starting toward home anywhere within a span of an hour or more. Going in was much more consistent.
The walker wasn't sauntering, but he wasn't speed-walking or jogging, either. When I would see him through the workshop windows, it was generally a couple of hours after I had arrived. The transportation pedestrian maintains a cruising pace, not a racing pace.
Because I hate driving, particularly with other drivers on the road, I have considered various ways to cover the distance to work in the seasons of darkness and frozen precipitation. The obvious first choice would be cross-country skiing. That depends on snow that will provide grip for the skis and smooth running. In New Hampshire, especially with the changing climate, ungroomed snow is often like soapy porcelain or wet concrete. And the skier would have to stay out of the travel lanes, probably outside of the plow drift.
Native Americans in New England invented the snowshoe, not the ski, because terrain and snow conditions here made the short, wide flotation more practical. I do not know if they experimented with some form of traction device lashed to the bottom of it, for the hard, refrozen conditions. However, when snowshoe hiking was the only way to get around, trails would get packed down to a smooth surface. The system worked for a few thousand years.
That was before cars and snowplows. In our modern world, a transportation snowshoe hiker is rare to nonexistent. I have not seen the summer pedestrian pushing into darkness and snow.
On snowshoes, the pedestrian would not be able to maintain more than about 3 miles per hour at best. Skis glide, but snowshoes give nothing away. Plod, plod, plod, you have to take every step. Along the highway, a walker might consider bare-booting it on the pavement when no vehicles were passing, hopping out of the way as necessary. On the stretches with a guardrail, that would require vaulting over the rail and whatever plow-piled snow was in the way. You wouldn't want to chew up the snowshoes on the pavement. Good luck leaping over the guardrail with them on your feet, too. Because a commuting pedestrian is on the road with commuting drivers, traffic will be heavy, requiring frequent leaps out of the way. Or you square your shoulders and forge ahead, leaving it to drivers to do the right thing.
A skier wouldn't be able to match bike pace. Skiing is generally faster than walking, but even on the downhills you won't hit the speeds that a bike can reach. Uphill skiing speeds are totally comparable to walking. So the trip to work and back would take much longer than a bike commute.
Winter rain screws everything up. Especially now, when torrential rains have become more frequent, crossing ten or fifteen miles without a vehicle, along routes designed for vehicles, would take many dangerous hours. Warmer than average temperatures are still much colder than your body temperature. Wetness saps your heat. You can dress for it, but things still have to go smoothly for you to arrive at a safe, warm destination where you can strip off your wet clothes. Arriving at work, that can be awkward. If you have no place to dry the clothes you wore to hike to work, you'll be putting on that clammy mess to head home.
On my particular route, there is a path option for the last three miles into town. The Cotton Valley Trail follows the old rail line, so it is basically straight and level. But you have to survive to get there. Homebound it only covers the first three miles, leaving you to navigate the highway after that. The trail is used by snow machines, bikes, dog walkers, skiers, and the rail car drivers who have demanded that the rails remain in place. They don't specifically clear the rails for winter use, but if the snow and ice cover is low enough I suppose one of them might give it a try. So, depending on surface conditions and time of day (or night) you might be completely alone or in the middle of a bustling winter scene like Currier and Ives only with more dog poop and attitude.
If I lived close enough to work I would definitely walk most of the time. I lived for nine years without using a car to get to my various jobs in the Annapolis area. Only when I moved to a place with snowier roads and a much longer commute did I get a car and start acting somewhat normal for at least part of the year. I like my spot here, so I can't reduce or alter my commuting route to make human-powered methods work safely for the entire year. Maybe if civilization collapses before the climate does I'll be able to ski the abandoned roads to get to work. Someone will have to start making wooden skis for the winter travelers, while we nurse along the simple bikes that survived from the 20th Century and the first few years of the 21st for the summer travelers.
Like all post-apocalyptic fantasies, that one glosses over the violence and destruction that would precede it. We'll never just flip a switch to the post-apocalyptic utopia. Then again, with consensus, we could flip the switch without the apocalypse. Add a human-powered travel corridor to all travel ways. Not everyone can do without a motor vehicle, but the ones who could do it would be more likely to try it if they had a guaranteed route.
The best thing about a snow-based winter system is that you don't have to pay to plow it down to a bare surface. Grooming snow requires machinery and skilled drivers, but it still takes less time and brute force than pushing snow out of the way. Along my route, a human-powered commuter or transportation cyclist could revert to the regular road when snow season ended. The side path would not have to be maintained for summer use. Most likely, the majority of users would like it year-round. That's a fine option. But a ski and walking path could have somewhat steeper climbs, requiring less massive re-grading to establish the route.
Here I am, planning the practicalities of something that isn't going to happen. I did want to be a fiction writer...