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[On-Car video material supplied by Mike Liecester / Video cover photo by Wikipedia]
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Note: Google Earth software reads the actual topography and ignores roads, cuttings, tunnels, bridges and excavations. The Google Earth vertical-profile animation generates a number of parallax errors, so the profile is only a general guide of what to expect in terms of gradients, distance and elevation. The graph may present some impossible and improbably sharp spikes, which should be ignored.
Digging into the details:
Getting there: Connect with the R80 from west or east via the N4 highway and head south towards Pretoria on the R80 (Mabopane Highway). You will arrive at the northern start of Theo Martin's Poort 2,7 km after joining the R80 just after the on/off ramp to the R513.
This small suburban pass is one of several north-south passages through the Magaliesberg. It lies just 5,25 km due east of Horn's Nek, which is featured elsewhere on this website. Being a freeway the road has up to three lanes in one direction up the ascents and two lanes on teh descents. The traffic moves fast on this road, which means there's not much time for enjoying the scenery.
The road starts ascending immediately after the R513 interchange at a steady gradient of 1:10, as it gently curves a few degrees to the left (east) before reaching the summit point of 1379m, exactly 816m after the start. Here the road is hemmed in either side by the narrow confines of the poort. The descent is at a smilar gradient to the ascent, except longer.Once through the summit zone, the road curves gently back into its original heading. The poort ends after 2.1 km at an altitude of 1303m ASL.
After the poort section ends, the road curves through 90 degrees into the east and soon ends at the point where it forms an interchange with the R101 - (D.F. Malan Drive). Head south for 4 km on the R101 to arrive in Pretoria.
Our research was not able to find out who Theo Martins was and why this poort was named after him. Anyone with information should kindly let us know via the contact page on this website.
|GPS START||S25.680090 E28.118264|
|GPS SUMMIT||S25.686352 E28.121235|
|GPS END||S25.697995 E28.123871|
|DIRECTION - TRAVEL||South|
|TIME REQUIRED||2 minutes|
|SPEED LIMIT||100 kph|
|NEAREST TOWN||Pretoria (14 km)|
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