SP50 — Exceeding the Speed Limit on a Motorway
Motorway speeding, including smart-motorway variable limits. Check your NIP before accepting the penalty.
SP50 covers exceeding the speed limit on a motorway — including the variable limits on smart motorways, where gantry cameras enforce whatever limit was displayed at the time. A large share of modern SP50s come from those variable-limit gantries rather than the national 70mph limit.
Penalties start at the standard £100 and 3 points, but motorway cases can go to court where the maximum fine is £2,500, and speeds well above the limit bring 6 points or an outright ban. Variable-limit cases are also where challenges most often succeed — the prosecution must show the reduced limit was correctly displayed.
SP50 penalties at a glance
- Fixed penalty: £100 and 3 points for marginal speeds.
- Court: means-tested fine up to £2,500 on motorways, 3–6 points or disqualification.
- Speeds far above the limit (e.g. 90+ in a 70) risk an immediate ban.
- Smart-motorway cases turn on whether the variable limit was properly signed and displayed.
- The endorsement remains on your record for 4 years.
I was flashed on a smart motorway — is that challengeable?
Sometimes. The force must be able to evidence the limit displayed on the gantry at that moment; signage faults or lane-specific display issues have overturned cases. A paperwork review tells you whether yours is worth contesting.
What speed triggers a court summons instead of a fixed penalty?
As a rule of thumb, speeds substantially above the limit — sentencing guidance puts 96mph+ in a 70 in the highest band, where disqualification is on the table. Anything in that range deserves professional advice before you respond.
Can I get a speed awareness course for an SP50?
Yes, for marginal speeds (broadly limit +10% +2 to +9mph), at the force’s discretion, if you haven’t attended a course in the last 3 years.
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