Peterborough, ON
Along National Highways: None
Along Provincial Highways (<=8km): ON-7E, ON-115
ON-7E
From: Start (ON-48 Markham, ON) - 136.1 km
To: End (ON-417 Ottawa, ON) - 241.3 km
Diversion: -6.7 km (cuts a corner)
ON-115
From: Start (ON-401 Newcastle, ON) - 53.6 km
To: End (ON-7 near Peterborough, ON) - 4.4 km
Diversion: 0.7 km
To: Bancroft, ON (Permit) (ON-7,ON-28,ON-62) - 116.6km
To: Ottawa, ON (ON-7,ON-417,ON-95) - 272.3km
To: Casselman, ON (ON-7,ON-417) - 324km
To: Belleville, ON (ON-7,ON-CR38,ON-CR2,ON-CR25,ON-CR27,ON-CR30,ON-401) - 106.6km
To: Port Hope, ON (ON-7,ON-CR28) - 38.7km
To: Pickering, ON (ON-7,ON-407,ON-412,ON-401) - 93.5km
To: Markham - Markville, ON (ON-7,ON-407) - 100.8km
To: Parry Sound, ON (ON-7,ON-12,ON-15,ON-12,ON-400) - 236.7km
To: Huntsville, ON (ON-7,ON-12,ON-CR169,ON-11) - 203.5km
To: Deep River, ON (ON-7,ON-41,l,TCH) - 309.8km
To: Renfrew, ON (Permit) (ON-7,ON-41,ON-132,ON-60) - 243.9km
Aside: in looking at ON-7, I ended up fixing an obvious reversed one-way on OpenStreetMap near Brougham, ON. It takes a few days to propagate to Mapbox (used by Supercharge.info).