Home / Alberta / Questions / Road Signs Road Signs Report White diamond on pavement + diamond sign: A Any vehicle B Reserved lane (HOV, bus, taxi) C Parking D Emergency only Show Answer & Explanation Correct Answer: B. Reserved lane (HOV, bus, taxi) HOV/bus/taxi rules vary by lane. Previous Next More Road Signs Questions A 'Pavement Ends / Gravel Ahead' sign: A dedicated bike lane: A 'Truck Route' sign directs: A 'Tunnel Ahead' sign: A green sign with exit number and destination: Often Missed All Alberta Questions Smart Practice Mock Exam Road Signs Guide