Peterborough is a city in England.
To hitch from Peterborough is possible, but you have to go some way out of the city. Although I have hitched from the train station.
Toward A15 and Sleaford
There are 2 possible gas stations, Morrisons and Shell.
Shell is slightly better as just after there is a bus layby that cars can pull into. Its just after a little roundabout. But about 2km from the bus station so taking the bus there is possible.
Sleaford - from Bourne outside the Esso service station there is a little roundabout. Just after is a crossing and here the cars must slow. Hitch from here and cars can pull up just after St Davids Lane. Don't go to Morton its really close.