Police have caught 40 drivers exceeding the limit by at least 45kmh in the national park this year, and 23 at Cataract. 

Police named the speeding hotspots on Tuesday after a 22-year-old man was allegedly caught driving at more than 177km/h in wet and foggy conditions at Mundarlo, south of Gundagai, early that morning. 

Police stopped the vehicle on the Hume Highway just south of Gundagai about 7.30am and issued fines worth $3000 to the driver, a Victorian student with an international drivers license. 

The man’s right to drive in NSW was suspended for six months. His passenger – a 23-year-old overseas man travelling in a rear seat –  was fined $325 for not wearing a seatbelt. 

Acting Assistant Commissioner Stuart Smith of the state's Traffic and Highway Patrol Command said police had potentially saved two lives, and perhaps more, as a result of the intercept. 

Police issued 223,261 speeding fines in the last financial year, including 2889 infringements for speeds 45kmh over the signposted limit.

These figures are an increase of 13,294 for all speeding events, and 215 for over 45km/h speeds detected. 

"With the road toll currently at 221, which is 43 more than this time last year, those using our roads clearly need to do more to ensure not only their own safety, but that of other road users," Acting Assistant Commissioner Smith said. 

Mascot is the state’s top location for speeding fines generally (2950 infringements) and for speeding at more than 45kmh over the limit (121). 

Mittagong (82), Goulburn (60), Botany (38), Eastern Creek (35), Tumblong (29), Prospect (29), Alfords Point (29) and Leppington (23) otherwise topped the over-45kmh table. 

For speeding generally, Nabiac (2778), Goulburn (2586), Mittagong (2504) Frederickton (2360), Wilton (2034), Pyrmont (1697), Queanbeyan (1462), Coffs Harbour (1413) and Lawson (1,279) rounded out the list.