40 50 60 70 M.P.H. M.P.H. M.P.H. M.P.H. MINISTRY OF SUPPLY RUBBER SHORTAGE GO EASY WITH YOUR TYRES 90% of the world's natural rubber resources are in enemy hands—care in the use of tyres is the most effective way to con- serve available supplies. Never drive a commercial vehicle above its legal speed limit. Avoid driving a car over 40 m.p.h. Never corner at speed. Never accelerate fiercely. Remember that fierce brak- ing wastes rubber. REMEMBER, it is equally important— to have tyre pressures checked every week.