Carpet: Long fibered carpet will make the drive of both an electric chair and a manual wheelchair sluggish.
Sidewalks: Smooth asphalt is no problem but sidewalks are made of segmented pieces that have dips between them that over time can space out or be forced apart by underground tree limbs (as well as making them jut upward at odd angles)
Grass: Grass (especially wild grass) can camouflage many hazards. While driving over a grassy terrain it can be impossible to see holes or solid objects and you cannot compensate for where the ground might give way.
Smooth Surfaces: Generally things like linoleum are not a problem unless they become wet or covered in dirt. You have to adjust the speed or strength with which you move so you aren’t as forceful and end up running into something. You also must take into account your chair’s want to spin or slide.
Ramps: In some areas accessible ramps have mandatory bright yellow plastic coverings with a random pattern of bumps on them. The sensation of driving over them is jarring and very uncomfortable.
Steep Inclines: An electrical chair may go slowly or strain to go up the high incline and will gain speed and sometimes lose control going down. The manual wheelchair will take a great amount of strength to go upward and is very dangerous to go downward without a greater amount of strength and control.
Going across a steep incline can be hard to maneuver as your chair has the inclination to turn down into the slope. An electrical chair will require readjusting from time to time and the manual wheelchair will take a good amount of strength and maneuvering to keep a straight path
Sand: Sand, as well as loose dirt, can be impossible to gain traction on and will inevitably sink. Wheelchairs specific to be used on beaches have been developed that have ballooned wheels but you cannot move yourself and him and they look awful.
Wooden Planks: Places such as the docks or rail yards and even in some old Western towns have wooden planks as their walkways. Driving over them, regardless of your type of chair, is incredibly jarring and painful, without breaks it can be impossible to drive on them for long periods of time. The vibration and shaking can be so bad that in an electric wheelchair can short out and leave you stranded.
General Notes: Any terrain that has holes or cracks or chips in it can run you the risk of getting a wheel stuck or even flipping you.
Maneuvering through and around obstacles can appear sporadic to the untrained eye and leads well-meaning able-bodied people to take hold of your wheelchair and push it in an attempt to help, which can be very dangerous. Dangerous despite the fact that being abruptly pushed can sometimes get your fingers or feet caught or broken, these people do not understand the physics involved and will apply force when finesse is necessary and sometimes dump you right out of the chair.
Specific disabilities make for specific needs for maneuvering and accommodations for pain. General pain is to be expected with most disabilities but riding in a wheelchair and the amount of shaking and bumping that is involved multiplies this pain. If you are writing a disabled character in a wheelchair it is important to note this and the likelihood of “pressure sores” Sitting for long periods of times can kill tissue and result in nerve damage on your butt in the back of your thighs and if you have developed pressure sores terrains like the wooden planks I described can be impossible to go over.
I’m sure I’m forgetting something, a few things most likely, so if anyone has anything to add please be my guest.