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Table 1 Characteristics of the different scenarios used (French law limits speeds to 130 kph (81 mph) or 110 kph (68 mph) on motorways, 90 kph (56 mph) in rural and periurban areas and 50 kph (31 mph) in built-up areas. However, local special features may be applied according to the context

From: Measurement of the potential geographic accessibility from call to definitive care for patient with acute stroke

Scenario Modelling Speed Justification of speed adaptations
Scenario 1 Initial database Respect of national speed limits Private car submitted to French Highway Code respect
Scenario 2 Emergency transport 20 kph (12 mph) above the limit throughout the road network Analysis based on Rhône’s SAMU stroke interventions between 2012 and 2016, and Petzäll et al. [31] study
Scenario 2’ Emergency transport in urban and rural areas 20 kph (12 mph) higher in rural areas and 10 kph (6.2 mph) lower in urban areas Complementary scenario for sensitivity analysis, based on literature review (Petzäll et al. [31]) and SAMU interventions analysis
Scenario 3 Difficult weather conditions (rain, fog, snow) 20 kph (12 mph) lower than the limit throughout the road network Respect of the R413-2 article French Highway Code when there is severe weather conditions
Scenario 4 Emergency transport with traffic jams in the Lyons city area 20 kph (12 mph) lower in the Lyons metropolitan network (59 communes), 20 kph (12 mph) higher in the rest of the network Petzäll et al. [31] study and SAMU interventions analysis for 20 kph higher and SAMU interventions analysis during traffic jam for 20 kph lower