A railway component, wherein the component is a molded or extruded seat component or a molded or extruded interior train cladding, comprising a thermoplastic composition comprising, based on the total weight of the composition: 48 to 95 wt.% of a second polymer comprising bisphenol A carbonate units, monoaryl arylate units, and siloxane units, or a combination comprising the second polymer and a first polymer comprising bisphenol A carbonate units and monoaryl arylate units; 5 to 40 wt.% of a polyetherimide; optionally, up to 5 wt.% of an additive composition comprising an additive selected from a processing aid, a heat stabilizer, an ultra violet light absorber, a colorant, or a combination comprising at least one of the foregoing; and optionally, 2 to 12 wt.% of an organophosphorus compound in an amount effective to provide 0.1 to 1.0 wt.% of phosphorus, based on the total weight of the thermoplastic polymer composition, wherein the bisphenol A carbonate units are of the formula the monoaryl arylate units are of the formula wherein each R h is independently a halogen atom, a C 1-10 hydrocarbyl and n is 0 to 4; and the siloxane units are of the formula or a combination comprising at least one of the foregoing, wherein E has an average value of 2 to 90; wherein a sample of the thermoplastic composition has: a smoke density after 4 minutes (Ds-4) of equal to or less than 150 measured in accordance with ISO 5659-2 on a 3 mm thick plaque at 50 kW/m 2, an integral of the smoke density as a function of time up to 4 minutes of equal to or less than 300 measured in accordance with ISO 5659-2 on a 3 mm thick plaque at 50 kW/m 2, a maximum average heat release (MAHRE) of equal to or less than 90 kW/m 2 measured in accordance with ISO 5660-1 on a 3 mm thick plaque at 50 kW/m 2, and a ductility in multiaxial impact of 80% to 100%, measured at 23°C at an impact speed of 4.4 m/second in accordance with ISO 6603 on 3.2 mm thick discs, provided that when the component is an extruded or molded interior train cladding, a sample of the thermoplastic composition also has a critical heat flux at extinguishment of equal to or greater than 20 kW/m 2 measured in accordance with ISO 5658-2 on a 3 mm thick plaque. 48 to 95 wt.% of a second polymer comprising bisphenol A carbonate units, monoaryl arylate units, and siloxane units, or a combination comprising the second polymer and a first polymer comprising bisphenol A carbonate units and monoaryl arylate units; 5 to 40 wt.% of a polyetherimide; optionally, up to 5 wt.% of an additive composition comprising an additive selected from a processing aid, a heat stabilizer, an ultra violet light absorber, a colorant, or a combination comprising at least one of the foregoing; and optionally, 2 to 12 wt.% of an organophosphorus compound in an amount effective to provide 0.1 to 1.0 wt.% of phosphorus, based on the total weight of the thermoplastic polymer composition, wherein the bisphenol A carbonate units are of the formula the monoaryl arylate units are of the formula wherein each R h is independently a halogen atom, a C 1-10 hydrocarbyl and n is 0 to 4; and the siloxane units are of the formula or a combination comprising at least one of the foregoing, wherein E has an average value of 2 to 90; wherein a sample of the thermoplastic composition has: a smoke density after 4 minutes (Ds-4) of equal to or less than 150 measured in accordance with ISO 5659-2 on a 3 mm thick plaque at 50 kW/m 2, an integral of the smoke density as a function of time up to 4 minutes of equal to or less than 300 measured in accordance with ISO 5659-2 on a 3 mm thick plaque at 50 kW/m 2, a maximum average heat release (MAHRE) of equal to or less than 90 kW/m 2 measured in accordance with ISO 5660-1 on a 3 mm thick plaque at 50 kW/m 2, and a ductility in multiaxial impact of 80% to 100%, measured at 23°C at an impact speed of 4.4 m/second in accordance with ISO 6603 on 3.2 mm thick discs, provided that when the component is an extruded or molded interior train cladding, a sample of the thermoplastic composition also has a critical heat flux at extinguishment of equal to or greater than 20 kW/m 2 measured in accordance with ISO 5658-2 on a 3 mm thick plaque. a smoke density after 4 minutes (Ds-4) of equal to or less than 150 measured in accordance with ISO 5659-2 on a 3 mm thick plaque at 50 kW/m 2, an integral of the smoke density as a function of time up to 4 minutes of equal to or less than 300 measured in accordance with ISO 5659-2 on a 3 mm thick plaque at 50 kW/m 2, a maximum average heat release (MAHRE) of equal to or less than 90 kW/m 2 measured in accordance with ISO 5660-1 on a 3 mm thick plaque at 50 kW/m 2, and a ductility in multiaxial impact of 80% to 100%, measured at 23°C at an impact speed of 4.4 m/second in accordance with ISO 6603 on 3.2 mm thick discs, provided that when the component is an extruded or molded interior train cladding, a sample of the thermoplastic composition also has a critical heat flux at extinguishment of equal to or greater than 20 kW/m 2 measured in accordance with ISO 5658-2 on a 3 mm thick plaque.