Table 4.

Estimate results for marginal effects of risk factors.

Variables	Non-Intersections				Intersections
	PDO	Slight Injury	Serious Injury	Fatality	PDO	Slight Injury	Serious Injury	Fatality
Above 60 years old	−0.574	−0.057	0.454	0.552	−0.601	−0.058	0.402	0.441
Without helmets	−0.618	0.005	0.301	0.315	−0.933	−0.002	0.355	0.344
Equal duty	−0.291	−0.013	0.187	0.208	−0.700	−0.050	0.417	0.445
Three-wheel motorcycle	1.776	−0.105	−0.570	−0.566	2.100	−0.080	−0.507	−0.467
Collision vehicles
Heavy vehicles	−0.776	−0.082	0.621	0.772	−1.056	−0.157	0.828	1.019
National and provincial roads	0.463	−0.003	−0.227	−0.238
Road alignment
Straight					0.403	0.019	−0.211	−0.215
Curve and slope	−0.318	−0165	0.212	0.240
No signal control					0.590	0.012	−0.258	−0.255
Light conditions
Daylight	0.496	0.022	−0.320	−0.360	0.942	0.081	−0.592	−0.654
Night with light					1.204	−0.019	−0.386	−0.365
GDP	−0.184	−0.003	0.104	0.112

Note: PDO denotes the abbreviation of property damage only.