This is a d100 table of Things That Happen If You Fail Your Handling Check while driving across the mutated wasteland. It only has 50 results so far. If you feel like helping out, write in some more results in the comments and number them starting with 51 and going up. If you only wanna do 1 or 2 that's fine...
It'll probably get used tomorrow.
("dex or d4" means make a dex or pp roll to avoid taking d4 damage. Seat belts prevent this unless otherwise noted. )
(flip a coin or something to see if you go left or right, if applicable.)
1-skid 40 feet, stall.
2-skid, spin 180, stay in same lane.
3-flip over once. You're upside down. dex or d4.
4-flip over twice. You're right side up but not moving. car needs work. dex or d6.
5-spin off the road. still rolling,
6-spin off the road and hit mutant plant which releases spores. con roll or gain a random mutation.
7-spin off the road and hit something hard dex or d8.
8-hit other vehicle--just a tap. 10 sdc to both. If there's no other vehicle, you scratch a sign, guard rail, etc.
9-hit other vehicle--hard. handling checks at -2/10% for both drivers. d8x10 damage to both vehicles.
10-hit other vehicle--medium. handling check for both drivers at -2/10%.
11-hit other vehicle--catastrophic. roll again on this table for both cars twice, each car takes d10x10 damage.
12-pop a side wheelie for a mile and come down smooth. successful charisma check means you manage to convince everyone in the vehicle it was on purpose.
13-minor engine explosion. those within 10 feet of engine take d6 damage. there goes your engine.
14-fwip fwip fwip! one random tire gone. handling check once per round if you go over 35 mph.
15-lost a hubcap. c'est la vie.
16-k-chunk! bad bump, something's hitting the wheel and making bad scary noise. no immediate obvious effect but the longer you ride this, the worse it'll be (GM's discretion).
17-pop a side wheelie and come down hard. roll again.
18-catch some air, come down. make another handling check.
19-due to some combination of geography and speed, you catch some serious air. handling check at -3, but if you make it, you are +1 on all initiative rolls for the rest of the day because you're so buzzed
20-fly 60 feet through the air, come down hard. your car is dead. dex or d10 sdc to everybody inside.
21-flip over and spin. dex or d12 to everybody inside.
22-whoaaaaa. wiggly. dex or d4 to everybody inside.
23-pothole or something. transmission wrenched. speed halved.
24-slide into other vehicle but, hey, look at that, they take 20 sdc and have to make a handling check and you're fine.
25-lost your muffler.
26-chugk. rattlerattle. ting! something stuck somewhere in your vehicle fell out and now it runs better! +1 to all handling checks from now on.
27-gas tank leak. lose 5 gallons per mile.
28-thunkg, wrenchhhh, ching! lose random window.
29-same, but lose back window
30-same, but lose front windshield
31-swerve, slam into your horn. now it won't stop. -2 to everyone on everything until they get used to it (takes 5 minutes).
32-lost a headlight.
33-lost both headlights.
34-lost a side mirror. -3/15% to handling checks when you'd want a side mirror.
35-trunk flies open. 50-5o chance anything in there falls out. roll once per item.
36-part of your vehicle is on fire now. you're not sure which part.
37-radio comes on spontaneously, it's your favorite song. if the vehicle has no radio, you suddenly discover that it does. rock! Now if it's the post-apocalypse, where the fuck did that radio station come from?
38-weird swerve. anybody in the back seat roll dex or d6.
39-skid. whirr, k-chuggg-kk! everybody inside dex or d6. car takes 50 sdc. it's ok. it's ok.
40-big fucking crash into nearby large and unmoving object. car is totalled. everybody dex or d20. dex or d12 if you're wearing a seatbelt.
41-fly into the air--you're about to flip but your car is held in a mysterious null-inertia field. you just hang there. what the fuck?
42-oh, that didn't sound good. vehicle takes 100 sdc.
43-whoa, whoa, whoa! crissssh! all handling checks are at -2/-10% now.
44-as above, except -4, -30%
46-roll three times
47-vrooom, screech, skraaaaaape, wobblewobble. everybody roll con or PE to avoid vomiting.
48-mutant animal suddenly appears in the road. 1-2 small 3-4 medium but fast 5-6 large with chameleon-lke abilities (GM's choice of what exact animal)--Do you try to avoid hitting it? If so, roll again on this table. if not, well, ask your GM.)
49-brake immediately and everybody takes dex or d4 or roll three times. You decide.
50-move one lane to the right or left to avoid losing control.