of various types of road stud. On 1 April 2000, a zebra crossing was illegally painted across the northbound carriageway of the M3 between Junctions 4 and 4a. On 23 September 2017, two firebombs were thrown from a bridge onto the motorway between junctions 9 and 11 by 17-year-old Nicholas Elger (who suffered from a psychiactric illness) leading to an 11-hour closure costing the economy an estimated £40million. The attacker was identified after being linked to a bottle of Voss water used to transport the fuel. Elger told police he wished he had killed somebody and entered guilty pleas to two counts of arson recklessly endangering life. Junctions Data from driver location signs are used to provide distance and carriageway identification information. {| style="margin-left:1em; margin-bottom:1em; color:black; font-size:95%;" class="wikitable" |- style="background:#0080d0; text-align:center; color:white; font-size:120%;" | colspan="5" | M3 motorway junctions |- !scope=col|miles !scope=col|km !scope=col abbr="Northeastbound"|North-east bound exits (B carriageway) !scope=col|Junction !scope=col abbr="Southwestbound"|South-west bound exits (A carriageway) |- align="center" | 15.0||24.2 | Road continues as A316 to London | rowspan="2"|J1 | Sunbury, Kingston A308Non-motorway traffic |- style="text-align:center;" | 15.3||24.6 | Sunbury, Kingston A308 | Start of motorway |- style="text-align:center;" | 21.3||34.2 | Gatwick Heathrow – M25 (M23), (M4) | J2 | Gatwick, Heathrow (M23, M4) M25 |- style="text-align:center;" | 28.1||45.2 | Woking, Bracknell, Camberley, Bagshot, Lightwater A322 | J3 | Woking, Camberley, Bracknell, Bagshot, Lightwater A322 |- style="text-align:center;" | 32.6||52.5 | Guildford, Farnham, Camberley, Farnborough, Aldershot A331 | J4 | Guildford, Farnham, Camberley, Farnborough, Aldershot A331 |- style="text-align:center;" | | | style=background:skyblue | Entering Surrey | | style=background:skyblue | Entering Hampshire |- style="text-align:center;" | 34.4||55.4 | Fleet (A3013), Farnborough (West) A327 | J4a | Fleet (A3013), Farnborough (West) A327 |- style="text-align:center;" | | |Fleet services (Welcome Break) |Services |Fleet services (Welcome Break) |- style="text-align:center;" | 41.9||67.4 | Hook A287 B3349 | J5 | Hook A287 B3349 |- style="text-align:center;" | 46.6||75.0 | Basingstoke, Reading (A33), Alton A339 | J6 | Basingstoke, Newbury, Reading, Alton A339 |- style="text-align:center;" | 51.8||83.3 | Basingstoke A30 | J7 | Basingstoke A30 |- style="text-align:center;" | 53.1||85.5 | No access | J8 | The South West, Andover, Salisbury, Exeter A303 |- style="text-align:center;" | 59.9||96.4 |Winchester services (Moto) |Services |Winchester services (Moto) |- style="text-align:center;" | 63.9||102.8 | The Midlands, Newbury A34 trunk road Winchester A272, Alresford A31 | J9 | The Midlands, Newbury A34 trunk road Winchester A272 |- style="text-align:center;" | 65.2||105.0 | Winchester (City) B3330Alton, Alresford A31 | J10