Steve meet the point.

Especially, if you use the TJA1054A, Fault-tolerant CAN transceiver:

Features
Optimized for in-car low-speed communication

* Baud rate up to 125 kBaud
* Up to 32 nodes can be connected
* Supports unshielded bus wires
* Very low ElectroMagnetic Emission (EME) due to built-in slope control function and a very good matching of the CANL and CANH bus outputs
* Good ElectroMagnetic Immunity (EMI) in normal operating mode and in low power modes
* Fully integrated receiver filters
* Transmit Data (TxD) dominant time-out function.

Bus failure management

* Supports single-wire transmission modes with ground offset voltages up to 1.5 V
* Automatic switching to single-wire mode in the event of bus failures, even when the CANH bus wire is short-circuited to VCC
* Automatic reset to differential mode if bus failure is removed
* Full wake-up capability during failure modes.

Protections

# Bus pins short-circuit safe to battery and to ground
# Thermally protected
# Bus lines protected against transients in an automotive environment
# An unpowered node does not disturb the bus lines. Support for low power modes
# Low current sleep and standby mode with wake-up via the bus lines
# Power-on reset flag on the output.



I use the PCA82C251 high speed transceiver (up to 1Mbaud) in 24V industrial applications.



Peter